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Finding the Fourth Proportional to 398,851.20, 598,276.80 and 359,485.20

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Solution

The fourth proportional to 398,851.20, 598,276.80 and 359,485.20 is: 539,227.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,851.20 : 598,276.80 = 359,485.20 : x
  2. Step 2: Convert to fraction form
    398,851.20/598,276.80 = 359,485.20/x
  3. Step 3: Cross multiply
    398,851.20x = 598,276.80 × 359,485.20
  4. Step 4: Simplify right side
    398,851.20x = 215,071,655,103.36
  5. Step 5: Solve for x
    x = 215,071,655,103.36/398,851.20
  6. Step 6: Final answer
    x = 539,227.80

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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.