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Finding the Fourth Proportional to 438,079.76, 657,019.20 and 122,568.56

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Solution

The fourth proportional to 438,079.76, 657,019.20 and 122,568.56 is: 183,824.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,079.76 : 657,019.20 = 122,568.56 : x
  2. Step 2: Convert to fraction form
    438,079.76/657,019.20 = 122,568.56/x
  3. Step 3: Cross multiply
    438,079.76x = 657,019.20 × 122,568.56
  4. Step 4: Simplify right side
    438,079.76x = 80,529,897,236.35
  5. Step 5: Solve for x
    x = 80,529,897,236.35/438,079.76
  6. Step 6: Final answer
    x = 183,824.74

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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.