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Finding the Fourth Proportional to 391,245.21, 586,515.74 and 141,752.25

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Solution

The fourth proportional to 391,245.21, 586,515.74 and 141,752.25 is: 212,500.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,245.21 : 586,515.74 = 141,752.25 : x
  2. Step 2: Convert to fraction form
    391,245.21/586,515.74 = 141,752.25/x
  3. Step 3: Cross multiply
    391,245.21x = 586,515.74 × 141,752.25
  4. Step 4: Simplify right side
    391,245.21x = 83,139,925,096.65
  5. Step 5: Solve for x
    x = 83,139,925,096.65/391,245.21
  6. Step 6: Final answer
    x = 212,500.81

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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.