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Finding the Fourth Proportional to 702,959.70, 1,053,661.95 and 387,642.90

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Solution

The fourth proportional to 702,959.70, 1,053,661.95 and 387,642.90 is: 581,035.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,959.70 : 1,053,661.95 = 387,642.90 : x
  2. Step 2: Convert to fraction form
    702,959.70/1,053,661.95 = 387,642.90/x
  3. Step 3: Cross multiply
    702,959.70x = 1,053,661.95 × 387,642.90
  4. Step 4: Simplify right side
    702,959.70x = 408,444,573,917.66
  5. Step 5: Solve for x
    x = 408,444,573,917.66/702,959.70
  6. Step 6: Final answer
    x = 581,035.55

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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.