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Finding the Fourth Proportional to 283,543.97, 391,290.69 and 156,218.45

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Solution

The fourth proportional to 283,543.97, 391,290.69 and 156,218.45 is: 215,581.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,543.97 : 391,290.69 = 156,218.45 : x
  2. Step 2: Convert to fraction form
    283,543.97/391,290.69 = 156,218.45/x
  3. Step 3: Cross multiply
    283,543.97x = 391,290.69 × 156,218.45
  4. Step 4: Simplify right side
    283,543.97x = 61,126,823,134.78
  5. Step 5: Solve for x
    x = 61,126,823,134.78/283,543.97
  6. Step 6: Final answer
    x = 215,581.46

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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.