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Finding the Fourth Proportional to 388,512.13, 582,851.55 and 220,113.13

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Solution

The fourth proportional to 388,512.13, 582,851.55 and 220,113.13 is: 330,216.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,512.13 : 582,851.55 = 220,113.13 : x
  2. Step 2: Convert to fraction form
    388,512.13/582,851.55 = 220,113.13/x
  3. Step 3: Cross multiply
    388,512.13x = 582,851.55 × 220,113.13
  4. Step 4: Simplify right side
    388,512.13x = 128,293,278,995.85
  5. Step 5: Solve for x
    x = 128,293,278,995.85/388,512.13
  6. Step 6: Final answer
    x = 330,216.92

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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.