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Finding the Fourth Proportional to 625,329.48, 938,011.74 and 389,353.80

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Solution

The fourth proportional to 625,329.48, 938,011.74 and 389,353.80 is: 584,041.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,329.48 : 938,011.74 = 389,353.80 : x
  2. Step 2: Convert to fraction form
    625,329.48/938,011.74 = 389,353.80/x
  3. Step 3: Cross multiply
    625,329.48x = 938,011.74 × 389,353.80
  4. Step 4: Simplify right side
    625,329.48x = 365,218,435,413.61
  5. Step 5: Solve for x
    x = 365,218,435,413.61/625,329.48
  6. Step 6: Final answer
    x = 584,041.61

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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.