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Finding the Fourth Proportional to 391,395.50, 586,908.20 and 151,621.70

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Solution

The fourth proportional to 391,395.50, 586,908.20 and 151,621.70 is: 227,360.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,395.50 : 586,908.20 = 151,621.70 : x
  2. Step 2: Convert to fraction form
    391,395.50/586,908.20 = 151,621.70/x
  3. Step 3: Cross multiply
    391,395.50x = 586,908.20 × 151,621.70
  4. Step 4: Simplify right side
    391,395.50x = 88,988,019,027.94
  5. Step 5: Solve for x
    x = 88,988,019,027.94/391,395.50
  6. Step 6: Final answer
    x = 227,360.86

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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.