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Finding the Fourth Proportional to 391,440.88, 587,387.34 and 211,526.92

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Solution

The fourth proportional to 391,440.88, 587,387.34 and 211,526.92 is: 317,412.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,440.88 : 587,387.34 = 211,526.92 : x
  2. Step 2: Convert to fraction form
    391,440.88/587,387.34 = 211,526.92/x
  3. Step 3: Cross multiply
    391,440.88x = 587,387.34 × 211,526.92
  4. Step 4: Simplify right side
    391,440.88x = 124,248,234,877.19
  5. Step 5: Solve for x
    x = 124,248,234,877.19/391,440.88
  6. Step 6: Final answer
    x = 317,412.52

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1.5x scale

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.