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Finding the Fourth Proportional to 281,143.70, 421,715.55 and 254,024.90

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Solution

The fourth proportional to 281,143.70, 421,715.55 and 254,024.90 is: 381,037.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,143.70 : 421,715.55 = 254,024.90 : x
  2. Step 2: Convert to fraction form
    281,143.70/421,715.55 = 254,024.90/x
  3. Step 3: Cross multiply
    281,143.70x = 421,715.55 × 254,024.90
  4. Step 4: Simplify right side
    281,143.70x = 107,126,250,417.20
  5. Step 5: Solve for x
    x = 107,126,250,417.20/281,143.70
  6. Step 6: Final answer
    x = 381,037.35

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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.