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Finding the Fourth Proportional to 802,090, 1,106,884.20 and 479,813.68

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Solution

The fourth proportional to 802,090, 1,106,884.20 and 479,813.68 is: 662,142.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    802,090 : 1,106,884.20 = 479,813.68 : x
  2. Step 2: Convert to fraction form
    802,090/1,106,884.20 = 479,813.68/x
  3. Step 3: Cross multiply
    802,090x = 1,106,884.20 × 479,813.68
  4. Step 4: Simplify right side
    802,090x = 531,098,181,335.86
  5. Step 5: Solve for x
    x = 531,098,181,335.86/802,090
  6. Step 6: Final answer
    x = 662,142.88

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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.