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Finding the Fourth Proportional to 660,040.80, 990,061.20 and 328,264.80

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Solution

The fourth proportional to 660,040.80, 990,061.20 and 328,264.80 is: 492,397.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,040.80 : 990,061.20 = 328,264.80 : x
  2. Step 2: Convert to fraction form
    660,040.80/990,061.20 = 328,264.80/x
  3. Step 3: Cross multiply
    660,040.80x = 990,061.20 × 328,264.80
  4. Step 4: Simplify right side
    660,040.80x = 325,002,241,805.76
  5. Step 5: Solve for x
    x = 325,002,241,805.76/660,040.80
  6. Step 6: Final answer
    x = 492,397.20

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Similar ratio
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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.