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Finding the Fourth Proportional to 391,708.51, 587,562.80 and 258,557.67

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Solution

The fourth proportional to 391,708.51, 587,562.80 and 258,557.67 is: 387,836.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,708.51 : 587,562.80 = 258,557.67 : x
  2. Step 2: Convert to fraction form
    391,708.51/587,562.80 = 258,557.67/x
  3. Step 3: Cross multiply
    391,708.51x = 587,562.80 × 258,557.67
  4. Step 4: Simplify right side
    391,708.51x = 151,918,867,253.89
  5. Step 5: Solve for x
    x = 151,918,867,253.89/391,708.51
  6. Step 6: Final answer
    x = 387,836.53

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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.