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Finding the Fourth Proportional to 676,891.52, 933,991.60 and 386,370.40

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Solution

The fourth proportional to 676,891.52, 933,991.60 and 386,370.40 is: 533,123.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,891.52 : 933,991.60 = 386,370.40 : x
  2. Step 2: Convert to fraction form
    676,891.52/933,991.60 = 386,370.40/x
  3. Step 3: Cross multiply
    676,891.52x = 933,991.60 × 386,370.40
  4. Step 4: Simplify right side
    676,891.52x = 360,866,708,088.64
  5. Step 5: Solve for x
    x = 360,866,708,088.64/676,891.52
  6. Step 6: Final answer
    x = 533,123.40

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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.