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Finding the Fourth Proportional to 425,677.86, 638,582.40 and 145,129.50

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Solution

The fourth proportional to 425,677.86, 638,582.40 and 145,129.50 is: 217,716.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,677.86 : 638,582.40 = 145,129.50 : x
  2. Step 2: Convert to fraction form
    425,677.86/638,582.40 = 145,129.50/x
  3. Step 3: Cross multiply
    425,677.86x = 638,582.40 × 145,129.50
  4. Step 4: Simplify right side
    425,677.86x = 92,677,144,420.80
  5. Step 5: Solve for x
    x = 92,677,144,420.80/425,677.86
  6. Step 6: Final answer
    x = 217,716.62

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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.