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Finding the Fourth Proportional to 425,909.10, 638,863.65 and 238,896.30

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Solution

The fourth proportional to 425,909.10, 638,863.65 and 238,896.30 is: 358,344.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,909.10 : 638,863.65 = 238,896.30 : x
  2. Step 2: Convert to fraction form
    425,909.10/638,863.65 = 238,896.30/x
  3. Step 3: Cross multiply
    425,909.10x = 638,863.65 × 238,896.30
  4. Step 4: Simplify right side
    425,909.10x = 152,622,162,189.50
  5. Step 5: Solve for x
    x = 152,622,162,189.50/425,909.10
  6. Step 6: Final answer
    x = 358,344.45

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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.