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Finding the Fourth Proportional to 259.04, 387.90 and 149.06

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Solution

The fourth proportional to 259.04, 387.90 and 149.06 is: 223.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.04 : 387.90 = 149.06 : x
  2. Step 2: Convert to fraction form
    259.04/387.90 = 149.06/x
  3. Step 3: Cross multiply
    259.04x = 387.90 × 149.06
  4. Step 4: Simplify right side
    259.04x = 57,817.69
  5. Step 5: Solve for x
    x = 57,817.69/259.04
  6. Step 6: Final answer
    x = 223.20

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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.