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Finding the Fourth Proportional to 702,960.20, 1,053,662.70 and 387,643.40

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Solution

The fourth proportional to 702,960.20, 1,053,662.70 and 387,643.40 is: 581,036.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,960.20 : 1,053,662.70 = 387,643.40 : x
  2. Step 2: Convert to fraction form
    702,960.20/1,053,662.70 = 387,643.40/x
  3. Step 3: Cross multiply
    702,960.20x = 1,053,662.70 × 387,643.40
  4. Step 4: Simplify right side
    702,960.20x = 408,445,391,481.18
  5. Step 5: Solve for x
    x = 408,445,391,481.18/702,960.20
  6. Step 6: Final answer
    x = 581,036.30

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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.