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Finding the Fourth Proportional to 250.04, 345.06 and 156.78

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Solution

The fourth proportional to 250.04, 345.06 and 156.78 is: 216.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.04 : 345.06 = 156.78 : x
  2. Step 2: Convert to fraction form
    250.04/345.06 = 156.78/x
  3. Step 3: Cross multiply
    250.04x = 345.06 × 156.78
  4. Step 4: Simplify right side
    250.04x = 54,098.51
  5. Step 5: Solve for x
    x = 54,098.51/250.04
  6. Step 6: Final answer
    x = 216.36

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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.