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Finding the Fourth Proportional to 315,181.72, 434,891.28 and 187,869.16

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Solution

The fourth proportional to 315,181.72, 434,891.28 and 187,869.16 is: 259,223.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,181.72 : 434,891.28 = 187,869.16 : x
  2. Step 2: Convert to fraction form
    315,181.72/434,891.28 = 187,869.16/x
  3. Step 3: Cross multiply
    315,181.72x = 434,891.28 × 187,869.16
  4. Step 4: Simplify right side
    315,181.72x = 81,702,659,082.21
  5. Step 5: Solve for x
    x = 81,702,659,082.21/315,181.72
  6. Step 6: Final answer
    x = 259,223.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.