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Finding the Fourth Proportional to 391,119.51, 586,679.26 and 251,763.87

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Solution

The fourth proportional to 391,119.51, 586,679.26 and 251,763.87 is: 377,645.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,119.51 : 586,679.26 = 251,763.87 : x
  2. Step 2: Convert to fraction form
    391,119.51/586,679.26 = 251,763.87/x
  3. Step 3: Cross multiply
    391,119.51x = 586,679.26 × 251,763.87
  4. Step 4: Simplify right side
    391,119.51x = 147,704,640,946.34
  5. Step 5: Solve for x
    x = 147,704,640,946.34/391,119.51
  6. Step 6: Final answer
    x = 377,645.80

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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.