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Finding the Fourth Proportional to 432,989.60, 649,586.80 and 137,501.60

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Solution

The fourth proportional to 432,989.60, 649,586.80 and 137,501.60 is: 206,284.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,989.60 : 649,586.80 = 137,501.60 : x
  2. Step 2: Convert to fraction form
    432,989.60/649,586.80 = 137,501.60/x
  3. Step 3: Cross multiply
    432,989.60x = 649,586.80 × 137,501.60
  4. Step 4: Simplify right side
    432,989.60x = 89,319,224,338.88
  5. Step 5: Solve for x
    x = 89,319,224,338.88/432,989.60
  6. Step 6: Final answer
    x = 206,284.92

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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.