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Finding the Fourth Proportional to 393,887.70, 591,123.15 and 260,723.70

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Solution

The fourth proportional to 393,887.70, 591,123.15 and 260,723.70 is: 391,278.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,887.70 : 591,123.15 = 260,723.70 : x
  2. Step 2: Convert to fraction form
    393,887.70/591,123.15 = 260,723.70/x
  3. Step 3: Cross multiply
    393,887.70x = 591,123.15 × 260,723.70
  4. Step 4: Simplify right side
    393,887.70x = 154,119,814,823.66
  5. Step 5: Solve for x
    x = 154,119,814,823.66/393,887.70
  6. Step 6: Final answer
    x = 391,278.57

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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.