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Finding the Fourth Proportional to 869,094.70, 1,303,642.05 and 420,160.30

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Solution

The fourth proportional to 869,094.70, 1,303,642.05 and 420,160.30 is: 630,240.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,094.70 : 1,303,642.05 = 420,160.30 : x
  2. Step 2: Convert to fraction form
    869,094.70/1,303,642.05 = 420,160.30/x
  3. Step 3: Cross multiply
    869,094.70x = 1,303,642.05 × 420,160.30
  4. Step 4: Simplify right side
    869,094.70x = 547,738,634,820.62
  5. Step 5: Solve for x
    x = 547,738,634,820.62/869,094.70
  6. Step 6: Final answer
    x = 630,240.45

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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.