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Finding the Fourth Proportional to 391,319.66, 586,950.80 and 125,008.67

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Solution

The fourth proportional to 391,319.66, 586,950.80 and 125,008.67 is: 187,503.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,319.66 : 586,950.80 = 125,008.67 : x
  2. Step 2: Convert to fraction form
    391,319.66/586,950.80 = 125,008.67/x
  3. Step 3: Cross multiply
    391,319.66x = 586,950.80 × 125,008.67
  4. Step 4: Simplify right side
    391,319.66x = 73,373,935,303.64
  5. Step 5: Solve for x
    x = 73,373,935,303.64/391,319.66
  6. Step 6: Final answer
    x = 187,503.83

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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.