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Finding the Fourth Proportional to 391,521.40, 587,363.10 and 223,122.40

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Solution

The fourth proportional to 391,521.40, 587,363.10 and 223,122.40 is: 334,729.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,521.40 : 587,363.10 = 223,122.40 : x
  2. Step 2: Convert to fraction form
    391,521.40/587,363.10 = 223,122.40/x
  3. Step 3: Cross multiply
    391,521.40x = 587,363.10 × 223,122.40
  4. Step 4: Simplify right side
    391,521.40x = 131,053,864,543.44
  5. Step 5: Solve for x
    x = 131,053,864,543.44/391,521.40
  6. Step 6: Final answer
    x = 334,729.76

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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.