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Finding the Fourth Proportional to 425,681.11, 638,521.67 and 145,200.79

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Solution

The fourth proportional to 425,681.11, 638,521.67 and 145,200.79 is: 217,801.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,681.11 : 638,521.67 = 145,200.79 : x
  2. Step 2: Convert to fraction form
    425,681.11/638,521.67 = 145,200.79/x
  3. Step 3: Cross multiply
    425,681.11x = 638,521.67 × 145,200.79
  4. Step 4: Simplify right side
    425,681.11x = 92,713,850,916.12
  5. Step 5: Solve for x
    x = 92,713,850,916.12/425,681.11
  6. Step 6: Final answer
    x = 217,801.19

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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.