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Finding the Fourth Proportional to 639,162.46, 881,728.20 and 418,268.98

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Solution

The fourth proportional to 639,162.46, 881,728.20 and 418,268.98 is: 577,004.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,162.46 : 881,728.20 = 418,268.98 : x
  2. Step 2: Convert to fraction form
    639,162.46/881,728.20 = 418,268.98/x
  3. Step 3: Cross multiply
    639,162.46x = 881,728.20 × 418,268.98
  4. Step 4: Simplify right side
    639,162.46x = 368,799,555,953.40
  5. Step 5: Solve for x
    x = 368,799,555,953.40/639,162.46
  6. Step 6: Final answer
    x = 577,004.41

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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.