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Finding the Fourth Proportional to 391,444.88, 587,393.34 and 211,530.92

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Solution

The fourth proportional to 391,444.88, 587,393.34 and 211,530.92 is: 317,418.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,444.88 : 587,393.34 = 211,530.92 : x
  2. Step 2: Convert to fraction form
    391,444.88/587,393.34 = 211,530.92/x
  3. Step 3: Cross multiply
    391,444.88x = 587,393.34 × 211,530.92
  4. Step 4: Simplify right side
    391,444.88x = 124,251,853,612.07
  5. Step 5: Solve for x
    x = 124,251,853,612.07/391,444.88
  6. Step 6: Final answer
    x = 317,418.52

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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.