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Finding the Fourth Proportional to 666,040.80, 999,061.20 and 329,145.60

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Solution

The fourth proportional to 666,040.80, 999,061.20 and 329,145.60 is: 493,718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,040.80 : 999,061.20 = 329,145.60 : x
  2. Step 2: Convert to fraction form
    666,040.80/999,061.20 = 329,145.60/x
  3. Step 3: Cross multiply
    666,040.80x = 999,061.20 × 329,145.60
  4. Step 4: Simplify right side
    666,040.80x = 328,836,598,110.72
  5. Step 5: Solve for x
    x = 328,836,598,110.72/666,040.80
  6. Step 6: Final answer
    x = 493,718.40

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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.