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Finding the Fourth Proportional to 425,423.10, 638,134.65 and 236,466.30

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Solution

The fourth proportional to 425,423.10, 638,134.65 and 236,466.30 is: 354,699.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,423.10 : 638,134.65 = 236,466.30 : x
  2. Step 2: Convert to fraction form
    425,423.10/638,134.65 = 236,466.30/x
  3. Step 3: Cross multiply
    425,423.10x = 638,134.65 × 236,466.30
  4. Step 4: Simplify right side
    425,423.10x = 150,897,339,587.30
  5. Step 5: Solve for x
    x = 150,897,339,587.30/425,423.10
  6. Step 6: Final answer
    x = 354,699.45

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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.