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Finding the Fourth Proportional to 546,431.20, 819,646.80 and 386,998.90

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Solution

The fourth proportional to 546,431.20, 819,646.80 and 386,998.90 is: 580,498.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    546,431.20 : 819,646.80 = 386,998.90 : x
  2. Step 2: Convert to fraction form
    546,431.20/819,646.80 = 386,998.90/x
  3. Step 3: Cross multiply
    546,431.20x = 819,646.80 × 386,998.90
  4. Step 4: Simplify right side
    546,431.20x = 317,202,409,988.52
  5. Step 5: Solve for x
    x = 317,202,409,988.52/546,431.20
  6. Step 6: Final answer
    x = 580,498.35

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.