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Finding the Fourth Proportional to 391,738.65, 587,660.29 and 155,026.01

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Solution

The fourth proportional to 391,738.65, 587,660.29 and 155,026.01 is: 232,559.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,738.65 : 587,660.29 = 155,026.01 : x
  2. Step 2: Convert to fraction form
    391,738.65/587,660.29 = 155,026.01/x
  3. Step 3: Cross multiply
    391,738.65x = 587,660.29 × 155,026.01
  4. Step 4: Simplify right side
    391,738.65x = 91,102,629,994.14
  5. Step 5: Solve for x
    x = 91,102,629,994.14/391,738.65
  6. Step 6: Final answer
    x = 232,559.72

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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.