Home / 711,459.28-982,144.68-420,979.52

Finding the Fourth Proportional to 711,459.28, 982,144.68 and 420,979.52

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Solution

The fourth proportional to 711,459.28, 982,144.68 and 420,979.52 is: 581,147.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,459.28 : 982,144.68 = 420,979.52 : x
  2. Step 2: Convert to fraction form
    711,459.28/982,144.68 = 420,979.52/x
  3. Step 3: Cross multiply
    711,459.28x = 982,144.68 × 420,979.52
  4. Step 4: Simplify right side
    711,459.28x = 413,462,795,956.95
  5. Step 5: Solve for x
    x = 413,462,795,956.95/711,459.28
  6. Step 6: Final answer
    x = 581,147.52

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Double scale
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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.