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Finding the Fourth Proportional to 638,468.40, 957,702.60 and 259,388.40

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Solution

The fourth proportional to 638,468.40, 957,702.60 and 259,388.40 is: 389,082.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,468.40 : 957,702.60 = 259,388.40 : x
  2. Step 2: Convert to fraction form
    638,468.40/957,702.60 = 259,388.40/x
  3. Step 3: Cross multiply
    638,468.40x = 957,702.60 × 259,388.40
  4. Step 4: Simplify right side
    638,468.40x = 248,416,945,089.84
  5. Step 5: Solve for x
    x = 248,416,945,089.84/638,468.40
  6. Step 6: Final answer
    x = 389,082.60

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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.