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Finding the Fourth Proportional to 261,082.79, 391,016.94 and 253,899.47

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Solution

The fourth proportional to 261,082.79, 391,016.94 and 253,899.47 is: 380,258.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,082.79 : 391,016.94 = 253,899.47 : x
  2. Step 2: Convert to fraction form
    261,082.79/391,016.94 = 253,899.47/x
  3. Step 3: Cross multiply
    261,082.79x = 391,016.94 × 253,899.47
  4. Step 4: Simplify right side
    261,082.79x = 99,278,993,827.02
  5. Step 5: Solve for x
    x = 99,278,993,827.02/261,082.79
  6. Step 6: Final answer
    x = 380,258.67

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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.