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Finding the Fourth Proportional to 485,047.20, 727,570.80 and 408,064.80

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Solution

The fourth proportional to 485,047.20, 727,570.80 and 408,064.80 is: 612,097.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,047.20 : 727,570.80 = 408,064.80 : x
  2. Step 2: Convert to fraction form
    485,047.20/727,570.80 = 408,064.80/x
  3. Step 3: Cross multiply
    485,047.20x = 727,570.80 × 408,064.80
  4. Step 4: Simplify right side
    485,047.20x = 296,896,032,987.84
  5. Step 5: Solve for x
    x = 296,896,032,987.84/485,047.20
  6. Step 6: Final answer
    x = 612,097.20

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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.