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Finding the Fourth Proportional to 865,774.80, 1,298,662.20 and 487,861.20

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Solution

The fourth proportional to 865,774.80, 1,298,662.20 and 487,861.20 is: 731,791.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,774.80 : 1,298,662.20 = 487,861.20 : x
  2. Step 2: Convert to fraction form
    865,774.80/1,298,662.20 = 487,861.20/x
  3. Step 3: Cross multiply
    865,774.80x = 1,298,662.20 × 487,861.20
  4. Step 4: Simplify right side
    865,774.80x = 633,566,899,286.64
  5. Step 5: Solve for x
    x = 633,566,899,286.64/865,774.80
  6. Step 6: Final answer
    x = 731,791.80

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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.