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Finding the Fourth Proportional to 425,417.70, 638,126.55 and 414,920.10

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Solution

The fourth proportional to 425,417.70, 638,126.55 and 414,920.10 is: 622,380.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,417.70 : 638,126.55 = 414,920.10 : x
  2. Step 2: Convert to fraction form
    425,417.70/638,126.55 = 414,920.10/x
  3. Step 3: Cross multiply
    425,417.70x = 638,126.55 × 414,920.10
  4. Step 4: Simplify right side
    425,417.70x = 264,771,531,938.66
  5. Step 5: Solve for x
    x = 264,771,531,938.66/425,417.70
  6. Step 6: Final answer
    x = 622,380.15

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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.