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Finding the Fourth Proportional to 658,047.20, 987,070.80 and 159,411.20

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Solution

The fourth proportional to 658,047.20, 987,070.80 and 159,411.20 is: 239,116.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,047.20 : 987,070.80 = 159,411.20 : x
  2. Step 2: Convert to fraction form
    658,047.20/987,070.80 = 159,411.20/x
  3. Step 3: Cross multiply
    658,047.20x = 987,070.80 × 159,411.20
  4. Step 4: Simplify right side
    658,047.20x = 157,350,140,712.96
  5. Step 5: Solve for x
    x = 157,350,140,712.96/658,047.20
  6. Step 6: Final answer
    x = 239,116.80

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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.