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Finding the Fourth Proportional to 480,976.14, 663,165.72 and 389,191.80

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Solution

The fourth proportional to 480,976.14, 663,165.72 and 389,191.80 is: 536,614.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,976.14 : 663,165.72 = 389,191.80 : x
  2. Step 2: Convert to fraction form
    480,976.14/663,165.72 = 389,191.80/x
  3. Step 3: Cross multiply
    480,976.14x = 663,165.72 × 389,191.80
  4. Step 4: Simplify right side
    480,976.14x = 258,098,660,265.10
  5. Step 5: Solve for x
    x = 258,098,660,265.10/480,976.14
  6. Step 6: Final answer
    x = 536,614.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.