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Finding the Fourth Proportional to 391,580.57, 587,083.57 and 125,187.77

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Solution

The fourth proportional to 391,580.57, 587,083.57 and 125,187.77 is: 187,689.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,580.57 : 587,083.57 = 125,187.77 : x
  2. Step 2: Convert to fraction form
    391,580.57/587,083.57 = 125,187.77/x
  3. Step 3: Cross multiply
    391,580.57x = 587,083.57 × 125,187.77
  4. Step 4: Simplify right side
    391,580.57x = 73,495,682,931.94
  5. Step 5: Solve for x
    x = 73,495,682,931.94/391,580.57
  6. Step 6: Final answer
    x = 187,689.81

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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.