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Finding the Fourth Proportional to 702,937.70, 1,053,628.95 and 387,620.90

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Solution

The fourth proportional to 702,937.70, 1,053,628.95 and 387,620.90 is: 581,002.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,937.70 : 1,053,628.95 = 387,620.90 : x
  2. Step 2: Convert to fraction form
    702,937.70/1,053,628.95 = 387,620.90/x
  3. Step 3: Cross multiply
    702,937.70x = 1,053,628.95 × 387,620.90
  4. Step 4: Simplify right side
    702,937.70x = 408,408,601,865.06
  5. Step 5: Solve for x
    x = 408,408,601,865.06/702,937.70
  6. Step 6: Final answer
    x = 581,002.56

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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.