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Finding the Fourth Proportional to 660,712.70, 991,069.05 and 394,992.20

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Solution

The fourth proportional to 660,712.70, 991,069.05 and 394,992.20 is: 592,488.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,712.70 : 991,069.05 = 394,992.20 : x
  2. Step 2: Convert to fraction form
    660,712.70/991,069.05 = 394,992.20/x
  3. Step 3: Cross multiply
    660,712.70x = 991,069.05 × 394,992.20
  4. Step 4: Simplify right side
    660,712.70x = 391,464,544,411.41
  5. Step 5: Solve for x
    x = 391,464,544,411.41/660,712.70
  6. Step 6: Final answer
    x = 592,488.30

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Similar ratio
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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.