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Finding the Fourth Proportional to 521,666.40, 782,499.60 and 321,337.20

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Solution

The fourth proportional to 521,666.40, 782,499.60 and 321,337.20 is: 482,005.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,666.40 : 782,499.60 = 321,337.20 : x
  2. Step 2: Convert to fraction form
    521,666.40/782,499.60 = 321,337.20/x
  3. Step 3: Cross multiply
    521,666.40x = 782,499.60 × 321,337.20
  4. Step 4: Simplify right side
    521,666.40x = 251,446,230,465.12
  5. Step 5: Solve for x
    x = 251,446,230,465.12/521,666.40
  6. Step 6: Final answer
    x = 482,005.80

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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.