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Finding the Fourth Proportional to 437,039.80, 655,478.70 and 121,431.40

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Solution

The fourth proportional to 437,039.80, 655,478.70 and 121,431.40 is: 182,124.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,039.80 : 655,478.70 = 121,431.40 : x
  2. Step 2: Convert to fraction form
    437,039.80/655,478.70 = 121,431.40/x
  3. Step 3: Cross multiply
    437,039.80x = 655,478.70 × 121,431.40
  4. Step 4: Simplify right side
    437,039.80x = 79,595,696,211.18
  5. Step 5: Solve for x
    x = 79,595,696,211.18/437,039.80
  6. Step 6: Final answer
    x = 182,124.59

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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.