Home / 283,442.12-391,145.43-156,129.56

Finding the Fourth Proportional to 283,442.12, 391,145.43 and 156,129.56

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Solution

The fourth proportional to 283,442.12, 391,145.43 and 156,129.56 is: 215,456.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,442.12 : 391,145.43 = 156,129.56 : x
  2. Step 2: Convert to fraction form
    283,442.12/391,145.43 = 156,129.56/x
  3. Step 3: Cross multiply
    283,442.12x = 391,145.43 × 156,129.56
  4. Step 4: Simplify right side
    283,442.12x = 61,069,363,881.91
  5. Step 5: Solve for x
    x = 61,069,363,881.91/283,442.12
  6. Step 6: Final answer
    x = 215,456.21

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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.