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Finding the Fourth Proportional to 665,658,126.40, 998,487,189.60 and 646,526,250.40

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Solution

The fourth proportional to 665,658,126.40, 998,487,189.60 and 646,526,250.40 is: 969,789,375.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,658,126.40 : 998,487,189.60 = 646,526,250.40 : x
  2. Step 2: Convert to fraction form
    665,658,126.40/998,487,189.60 = 646,526,250.40/x
  3. Step 3: Cross multiply
    665,658,126.40x = 998,487,189.60 × 646,526,250.40
  4. Step 4: Simplify right side
    665,658,126.40x = 645,548,178,764,521,856
  5. Step 5: Solve for x
    x = 645,548,178,764,521,856/665,658,126.40
  6. Step 6: Final answer
    x = 969,789,375.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.