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Finding the Fourth Proportional to 399,321.60, 598,982.40 and 162,542.40

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Solution

The fourth proportional to 399,321.60, 598,982.40 and 162,542.40 is: 243,813.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,321.60 : 598,982.40 = 162,542.40 : x
  2. Step 2: Convert to fraction form
    399,321.60/598,982.40 = 162,542.40/x
  3. Step 3: Cross multiply
    399,321.60x = 598,982.40 × 162,542.40
  4. Step 4: Simplify right side
    399,321.60x = 97,360,036,853.76
  5. Step 5: Solve for x
    x = 97,360,036,853.76/399,321.60
  6. Step 6: Final answer
    x = 243,813.60

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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.