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Finding the Fourth Proportional to 481,722.10, 721,805.55 and 402,406.90

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Solution

The fourth proportional to 481,722.10, 721,805.55 and 402,406.90 is: 602,960.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,722.10 : 721,805.55 = 402,406.90 : x
  2. Step 2: Convert to fraction form
    481,722.10/721,805.55 = 402,406.90/x
  3. Step 3: Cross multiply
    481,722.10x = 721,805.55 × 402,406.90
  4. Step 4: Simplify right side
    481,722.10x = 290,459,533,778.30
  5. Step 5: Solve for x
    x = 290,459,533,778.30/481,722.10
  6. Step 6: Final answer
    x = 602,960.78

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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.