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Finding the Fourth Proportional to 283,442.13, 391,142.13 and 154,377.69

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Solution

The fourth proportional to 283,442.13, 391,142.13 and 154,377.69 is: 213,036.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,442.13 : 391,142.13 = 154,377.69 : x
  2. Step 2: Convert to fraction form
    283,442.13/391,142.13 = 154,377.69/x
  3. Step 3: Cross multiply
    283,442.13x = 391,142.13 × 154,377.69
  4. Step 4: Simplify right side
    283,442.13x = 60,383,618,491.08
  5. Step 5: Solve for x
    x = 60,383,618,491.08/283,442.13
  6. Step 6: Final answer
    x = 213,036.85

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1.5x scale

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.