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Finding the Fourth Proportional to 709,807.60, 979,488.89 and 387,517.01

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Solution

The fourth proportional to 709,807.60, 979,488.89 and 387,517.01 is: 534,748.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,807.60 : 979,488.89 = 387,517.01 : x
  2. Step 2: Convert to fraction form
    709,807.60/979,488.89 = 387,517.01/x
  3. Step 3: Cross multiply
    709,807.60x = 979,488.89 × 387,517.01
  4. Step 4: Simplify right side
    709,807.60x = 379,568,599,145.99
  5. Step 5: Solve for x
    x = 379,568,599,145.99/709,807.60
  6. Step 6: Final answer
    x = 534,748.57

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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.