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Finding the Fourth Proportional to 666,145.20, 999,217.80 and 548,047.20

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Solution

The fourth proportional to 666,145.20, 999,217.80 and 548,047.20 is: 822,070.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,145.20 : 999,217.80 = 548,047.20 : x
  2. Step 2: Convert to fraction form
    666,145.20/999,217.80 = 548,047.20/x
  3. Step 3: Cross multiply
    666,145.20x = 999,217.80 × 548,047.20
  4. Step 4: Simplify right side
    666,145.20x = 547,618,517,480.16
  5. Step 5: Solve for x
    x = 547,618,517,480.16/666,145.20
  6. Step 6: Final answer
    x = 822,070.80

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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.