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Finding the Fourth Proportional to 317,305.58, 476,082.98 and 139,687.97

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Solution

The fourth proportional to 317,305.58, 476,082.98 and 139,687.97 is: 209,586.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,305.58 : 476,082.98 = 139,687.97 : x
  2. Step 2: Convert to fraction form
    317,305.58/476,082.98 = 139,687.97/x
  3. Step 3: Cross multiply
    317,305.58x = 476,082.98 × 139,687.97
  4. Step 4: Simplify right side
    317,305.58x = 66,503,064,329.31
  5. Step 5: Solve for x
    x = 66,503,064,329.31/317,305.58
  6. Step 6: Final answer
    x = 209,586.81

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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.