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Finding the Fourth Proportional to 388,532.40, 581,632.20 and 230,679.60

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Solution

The fourth proportional to 388,532.40, 581,632.20 and 230,679.60 is: 345,326.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,532.40 : 581,632.20 = 230,679.60 : x
  2. Step 2: Convert to fraction form
    388,532.40/581,632.20 = 230,679.60/x
  3. Step 3: Cross multiply
    388,532.40x = 581,632.20 × 230,679.60
  4. Step 4: Simplify right side
    388,532.40x = 134,170,683,243.12
  5. Step 5: Solve for x
    x = 134,170,683,243.12/388,532.40
  6. Step 6: Final answer
    x = 345,326.88

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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.