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Finding the Fourth Proportional to 406,998.60, 610,497.90 and 389,721.30

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Solution

The fourth proportional to 406,998.60, 610,497.90 and 389,721.30 is: 584,581.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,998.60 : 610,497.90 = 389,721.30 : x
  2. Step 2: Convert to fraction form
    406,998.60/610,497.90 = 389,721.30/x
  3. Step 3: Cross multiply
    406,998.60x = 610,497.90 × 389,721.30
  4. Step 4: Simplify right side
    406,998.60x = 237,924,035,235.27
  5. Step 5: Solve for x
    x = 237,924,035,235.27/406,998.60
  6. Step 6: Final answer
    x = 584,581.95

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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.