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Finding the Fourth Proportional to 388,498.87, 582,831.68 and 220,099.87

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Solution

The fourth proportional to 388,498.87, 582,831.68 and 220,099.87 is: 330,197.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,498.87 : 582,831.68 = 220,099.87 : x
  2. Step 2: Convert to fraction form
    388,498.87/582,831.68 = 220,099.87/x
  3. Step 3: Cross multiply
    388,498.87x = 582,831.68 × 220,099.87
  4. Step 4: Simplify right side
    388,498.87x = 128,281,174,442.30
  5. Step 5: Solve for x
    x = 128,281,174,442.30/388,498.87
  6. Step 6: Final answer
    x = 330,197.04

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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.