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Finding the Fourth Proportional to 676,872.86, 934,110.43 and 386,531.80

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Solution

The fourth proportional to 676,872.86, 934,110.43 and 386,531.80 is: 533,428.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,872.86 : 934,110.43 = 386,531.80 : x
  2. Step 2: Convert to fraction form
    676,872.86/934,110.43 = 386,531.80/x
  3. Step 3: Cross multiply
    676,872.86x = 934,110.43 × 386,531.80
  4. Step 4: Simplify right side
    676,872.86x = 361,063,382,605.07
  5. Step 5: Solve for x
    x = 361,063,382,605.07/676,872.86
  6. Step 6: Final answer
    x = 533,428.66

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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.