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Finding the Fourth Proportional to 558,418.60, 836,639.70 and 539,918.20

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Solution

The fourth proportional to 558,418.60, 836,639.70 and 539,918.20 is: 808,921.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,418.60 : 836,639.70 = 539,918.20 : x
  2. Step 2: Convert to fraction form
    558,418.60/836,639.70 = 539,918.20/x
  3. Step 3: Cross multiply
    558,418.60x = 836,639.70 × 539,918.20
  4. Step 4: Simplify right side
    558,418.60x = 451,717,000,872.54
  5. Step 5: Solve for x
    x = 451,717,000,872.54/558,418.60
  6. Step 6: Final answer
    x = 808,921.84

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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.