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Finding the Fourth Proportional to 283,385.58, 391,074.66 and 156,061.68

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Solution

The fourth proportional to 283,385.58, 391,074.66 and 156,061.68 is: 215,366.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,385.58 : 391,074.66 = 156,061.68 : x
  2. Step 2: Convert to fraction form
    283,385.58/391,074.66 = 156,061.68/x
  3. Step 3: Cross multiply
    283,385.58x = 391,074.66 × 156,061.68
  4. Step 4: Simplify right side
    283,385.58x = 61,031,768,445.03
  5. Step 5: Solve for x
    x = 61,031,768,445.03/283,385.58
  6. Step 6: Final answer
    x = 215,366.53

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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.