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Finding the Fourth Proportional to 718,304.75, 991,267.43 and 396,026.40

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Solution

The fourth proportional to 718,304.75, 991,267.43 and 396,026.40 is: 546,520.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,304.75 : 991,267.43 = 396,026.40 : x
  2. Step 2: Convert to fraction form
    718,304.75/991,267.43 = 396,026.40/x
  3. Step 3: Cross multiply
    718,304.75x = 991,267.43 × 396,026.40
  4. Step 4: Simplify right side
    718,304.75x = 392,568,071,740.15
  5. Step 5: Solve for x
    x = 392,568,071,740.15/718,304.75
  6. Step 6: Final answer
    x = 546,520.22

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Half scale
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Double scale
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Similar ratio
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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.