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Finding the Fourth Proportional to 391,170.93, 586,756.40 and 213,581.07

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Solution

The fourth proportional to 391,170.93, 586,756.40 and 213,581.07 is: 320,371.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,170.93 : 586,756.40 = 213,581.07 : x
  2. Step 2: Convert to fraction form
    391,170.93/586,756.40 = 213,581.07/x
  3. Step 3: Cross multiply
    391,170.93x = 586,756.40 × 213,581.07
  4. Step 4: Simplify right side
    391,170.93x = 125,320,059,741.35
  5. Step 5: Solve for x
    x = 125,320,059,741.35/391,170.93
  6. Step 6: Final answer
    x = 320,371.61

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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.