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Finding the Fourth Proportional to 926,761.92, 1,389,874.48 and 278,312

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Solution

The fourth proportional to 926,761.92, 1,389,874.48 and 278,312 is: 417,387.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    926,761.92 : 1,389,874.48 = 278,312 : x
  2. Step 2: Convert to fraction form
    926,761.92/1,389,874.48 = 278,312/x
  3. Step 3: Cross multiply
    926,761.92x = 1,389,874.48 × 278,312
  4. Step 4: Simplify right side
    926,761.92x = 386,818,746,277.76
  5. Step 5: Solve for x
    x = 386,818,746,277.76/926,761.92
  6. Step 6: Final answer
    x = 417,387.40

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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.