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Finding the Fourth Proportional to 391,474.24, 587,303.30 and 121,588.60

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Solution

The fourth proportional to 391,474.24, 587,303.30 and 121,588.60 is: 182,411.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,474.24 : 587,303.30 = 121,588.60 : x
  2. Step 2: Convert to fraction form
    391,474.24/587,303.30 = 121,588.60/x
  3. Step 3: Cross multiply
    391,474.24x = 587,303.30 × 121,588.60
  4. Step 4: Simplify right side
    391,474.24x = 71,409,386,022.38
  5. Step 5: Solve for x
    x = 71,409,386,022.38/391,474.24
  6. Step 6: Final answer
    x = 182,411.46

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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.