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Finding the Fourth Proportional to 437,649.89, 656,474.76 and 138,340.58

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Solution

The fourth proportional to 437,649.89, 656,474.76 and 138,340.58 is: 207,510.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,649.89 : 656,474.76 = 138,340.58 : x
  2. Step 2: Convert to fraction form
    437,649.89/656,474.76 = 138,340.58/x
  3. Step 3: Cross multiply
    437,649.89x = 656,474.76 × 138,340.58
  4. Step 4: Simplify right side
    437,649.89x = 90,817,095,771.39
  5. Step 5: Solve for x
    x = 90,817,095,771.39/437,649.89
  6. Step 6: Final answer
    x = 207,510.84

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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.