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Finding the Fourth Proportional to 388,615.40, 582,807.90 and 151,821.80

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Solution

The fourth proportional to 388,615.40, 582,807.90 and 151,821.80 is: 227,687.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,615.40 : 582,807.90 = 151,821.80 : x
  2. Step 2: Convert to fraction form
    388,615.40/582,807.90 = 151,821.80/x
  3. Step 3: Cross multiply
    388,615.40x = 582,807.90 × 151,821.80
  4. Step 4: Simplify right side
    388,615.40x = 88,482,944,432.22
  5. Step 5: Solve for x
    x = 88,482,944,432.22/388,615.40
  6. Step 6: Final answer
    x = 227,687.69

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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.