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Finding the Fourth Proportional to 265,720,987.80, 398,581,481.70 and 178,989,816.60

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Solution

The fourth proportional to 265,720,987.80, 398,581,481.70 and 178,989,816.60 is: 268,484,724.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,720,987.80 : 398,581,481.70 = 178,989,816.60 : x
  2. Step 2: Convert to fraction form
    265,720,987.80/398,581,481.70 = 178,989,816.60/x
  3. Step 3: Cross multiply
    265,720,987.80x = 398,581,481.70 × 178,989,816.60
  4. Step 4: Simplify right side
    265,720,987.80x = 71,342,026,309,639,248
  5. Step 5: Solve for x
    x = 71,342,026,309,639,248/265,720,987.80
  6. Step 6: Final answer
    x = 268,484,724.90

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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.