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Finding the Fourth Proportional to 709,697.30, 979,344.88 and 387,344.84

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Solution

The fourth proportional to 709,697.30, 979,344.88 and 387,344.84 is: 534,515.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,697.30 : 979,344.88 = 387,344.84 : x
  2. Step 2: Convert to fraction form
    709,697.30/979,344.88 = 387,344.84/x
  3. Step 3: Cross multiply
    709,697.30x = 979,344.88 × 387,344.84
  4. Step 4: Simplify right side
    709,697.30x = 379,344,179,983.33
  5. Step 5: Solve for x
    x = 379,344,179,983.33/709,697.30
  6. Step 6: Final answer
    x = 534,515.47

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1.5x scale

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.