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Finding the Fourth Proportional to 371,605.80, 557,408.70 and 134,956.20

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Solution

The fourth proportional to 371,605.80, 557,408.70 and 134,956.20 is: 202,434.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,605.80 : 557,408.70 = 134,956.20 : x
  2. Step 2: Convert to fraction form
    371,605.80/557,408.70 = 134,956.20/x
  3. Step 3: Cross multiply
    371,605.80x = 557,408.70 × 134,956.20
  4. Step 4: Simplify right side
    371,605.80x = 75,225,759,998.94
  5. Step 5: Solve for x
    x = 75,225,759,998.94/371,605.80
  6. Step 6: Final answer
    x = 202,434.30

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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.