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Finding the Fourth Proportional to 257,758.32, 355,705.76 and 143,054.28

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Solution

The fourth proportional to 257,758.32, 355,705.76 and 143,054.28 is: 197,414.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,758.32 : 355,705.76 = 143,054.28 : x
  2. Step 2: Convert to fraction form
    257,758.32/355,705.76 = 143,054.28/x
  3. Step 3: Cross multiply
    257,758.32x = 355,705.76 × 143,054.28
  4. Step 4: Simplify right side
    257,758.32x = 50,885,231,388.65
  5. Step 5: Solve for x
    x = 50,885,231,388.65/257,758.32
  6. Step 6: Final answer
    x = 197,414.51

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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.