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Finding the Fourth Proportional to 353,708.70, 530,781.78 and 143,348.46

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Solution

The fourth proportional to 353,708.70, 530,781.78 and 143,348.46 is: 215,111.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,708.70 : 530,781.78 = 143,348.46 : x
  2. Step 2: Convert to fraction form
    353,708.70/530,781.78 = 143,348.46/x
  3. Step 3: Cross multiply
    353,708.70x = 530,781.78 × 143,348.46
  4. Step 4: Simplify right side
    353,708.70x = 76,086,750,759.06
  5. Step 5: Solve for x
    x = 76,086,750,759.06/353,708.70
  6. Step 6: Final answer
    x = 215,111.34

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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.