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Finding the Fourth Proportional to 253,215.38, 379,712.28 and 120,133.64

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Solution

The fourth proportional to 253,215.38, 379,712.28 and 120,133.64 is: 180,147.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,215.38 : 379,712.28 = 120,133.64 : x
  2. Step 2: Convert to fraction form
    253,215.38/379,712.28 = 120,133.64/x
  3. Step 3: Cross multiply
    253,215.38x = 379,712.28 × 120,133.64
  4. Step 4: Simplify right side
    253,215.38x = 45,616,218,349.10
  5. Step 5: Solve for x
    x = 45,616,218,349.10/253,215.38
  6. Step 6: Final answer
    x = 180,147.90

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1.5x scale

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.