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Finding the Fourth Proportional to 522,440.22, 721,046.31 and 318,609.38

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Solution

The fourth proportional to 522,440.22, 721,046.31 and 318,609.38 is: 439,729.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,440.22 : 721,046.31 = 318,609.38 : x
  2. Step 2: Convert to fraction form
    522,440.22/721,046.31 = 318,609.38/x
  3. Step 3: Cross multiply
    522,440.22x = 721,046.31 × 318,609.38
  4. Step 4: Simplify right side
    522,440.22x = 229,732,119,583.00
  5. Step 5: Solve for x
    x = 229,732,119,583.00/522,440.22
  6. Step 6: Final answer
    x = 439,729.01

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1.5x scale

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.