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Finding the Fourth Proportional to 391,846.88, 587,278.37 and 211,925.13

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Solution

The fourth proportional to 391,846.88, 587,278.37 and 211,925.13 is: 317,621.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,846.88 : 587,278.37 = 211,925.13 : x
  2. Step 2: Convert to fraction form
    391,846.88/587,278.37 = 211,925.13/x
  3. Step 3: Cross multiply
    391,846.88x = 587,278.37 × 211,925.13
  4. Step 4: Simplify right side
    391,846.88x = 124,459,044,908.44
  5. Step 5: Solve for x
    x = 124,459,044,908.44/391,846.88
  6. Step 6: Final answer
    x = 317,621.63

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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.