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Finding the Fourth Proportional to 257,767.16, 386,495.44 and 115,586.70

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Solution

The fourth proportional to 257,767.16, 386,495.44 and 115,586.70 is: 173,310.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,767.16 : 386,495.44 = 115,586.70 : x
  2. Step 2: Convert to fraction form
    257,767.16/386,495.44 = 115,586.70/x
  3. Step 3: Cross multiply
    257,767.16x = 386,495.44 × 115,586.70
  4. Step 4: Simplify right side
    257,767.16x = 44,673,732,474.65
  5. Step 5: Solve for x
    x = 44,673,732,474.65/257,767.16
  6. Step 6: Final answer
    x = 173,310.41

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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.