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Finding the Fourth Proportional to 718,293.60, 991,252.08 and 396,016.20

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Solution

The fourth proportional to 718,293.60, 991,252.08 and 396,016.20 is: 546,506.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,293.60 : 991,252.08 = 396,016.20 : x
  2. Step 2: Convert to fraction form
    718,293.60/991,252.08 = 396,016.20/x
  3. Step 3: Cross multiply
    718,293.60x = 991,252.08 × 396,016.20
  4. Step 4: Simplify right side
    718,293.60x = 392,551,881,963.70
  5. Step 5: Solve for x
    x = 392,551,881,963.70/718,293.60
  6. Step 6: Final answer
    x = 546,506.17

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1.5x scale

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.