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Finding the Fourth Proportional to 610.80, 916.21 and 148.58

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Solution

The fourth proportional to 610.80, 916.21 and 148.58 is: 222.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.80 : 916.21 = 148.58 : x
  2. Step 2: Convert to fraction form
    610.80/916.21 = 148.58/x
  3. Step 3: Cross multiply
    610.80x = 916.21 × 148.58
  4. Step 4: Simplify right side
    610.80x = 136,127.45
  5. Step 5: Solve for x
    x = 136,127.45/610.80
  6. Step 6: Final answer
    x = 222.87

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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.