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Finding the Fourth Proportional to 240,470.78, 331,955.98 and 143,708.78

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Solution

The fourth proportional to 240,470.78, 331,955.98 and 143,708.78 is: 198,381.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,470.78 : 331,955.98 = 143,708.78 : x
  2. Step 2: Convert to fraction form
    240,470.78/331,955.98 = 143,708.78/x
  3. Step 3: Cross multiply
    240,470.78x = 331,955.98 × 143,708.78
  4. Step 4: Simplify right side
    240,470.78x = 47,704,988,899.50
  5. Step 5: Solve for x
    x = 47,704,988,899.50/240,470.78
  6. Step 6: Final answer
    x = 198,381.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.