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Finding the Fourth Proportional to 658,639.86, 908,911.14 and 372,153.78

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Solution

The fourth proportional to 658,639.86, 908,911.14 and 372,153.78 is: 513,565.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,639.86 : 908,911.14 = 372,153.78 : x
  2. Step 2: Convert to fraction form
    658,639.86/908,911.14 = 372,153.78/x
  3. Step 3: Cross multiply
    658,639.86x = 908,911.14 × 372,153.78
  4. Step 4: Simplify right side
    658,639.86x = 338,254,716,435.11
  5. Step 5: Solve for x
    x = 338,254,716,435.11/658,639.86
  6. Step 6: Final answer
    x = 513,565.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.