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Finding the Fourth Proportional to 768,279.60, 1,152,419.40 and 516,337.20

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Solution

The fourth proportional to 768,279.60, 1,152,419.40 and 516,337.20 is: 774,505.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,279.60 : 1,152,419.40 = 516,337.20 : x
  2. Step 2: Convert to fraction form
    768,279.60/1,152,419.40 = 516,337.20/x
  3. Step 3: Cross multiply
    768,279.60x = 1,152,419.40 × 516,337.20
  4. Step 4: Simplify right side
    768,279.60x = 595,037,006,221.68
  5. Step 5: Solve for x
    x = 595,037,006,221.68/768,279.60
  6. Step 6: Final answer
    x = 774,505.80

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1.5x scale

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.