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Finding the Fourth Proportional to 406,987.60, 610,481.40 and 389,710.30

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Solution

The fourth proportional to 406,987.60, 610,481.40 and 389,710.30 is: 584,565.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,987.60 : 610,481.40 = 389,710.30 : x
  2. Step 2: Convert to fraction form
    406,987.60/610,481.40 = 389,710.30/x
  3. Step 3: Cross multiply
    406,987.60x = 610,481.40 × 389,710.30
  4. Step 4: Simplify right side
    406,987.60x = 237,910,889,538.42
  5. Step 5: Solve for x
    x = 237,910,889,538.42/406,987.60
  6. Step 6: Final answer
    x = 584,565.45

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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.