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Finding the Fourth Proportional to 702,958.20, 1,053,659.70 and 387,641.40

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Solution

The fourth proportional to 702,958.20, 1,053,659.70 and 387,641.40 is: 581,033.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,958.20 : 1,053,659.70 = 387,641.40 : x
  2. Step 2: Convert to fraction form
    702,958.20/1,053,659.70 = 387,641.40/x
  3. Step 3: Cross multiply
    702,958.20x = 1,053,659.70 × 387,641.40
  4. Step 4: Simplify right side
    702,958.20x = 408,442,121,231.58
  5. Step 5: Solve for x
    x = 408,442,121,231.58/702,958.20
  6. Step 6: Final answer
    x = 581,033.30

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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.