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Finding the Fourth Proportional to 458.93, 688.51 and 150.78

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Solution

The fourth proportional to 458.93, 688.51 and 150.78 is: 226.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.93 : 688.51 = 150.78 : x
  2. Step 2: Convert to fraction form
    458.93/688.51 = 150.78/x
  3. Step 3: Cross multiply
    458.93x = 688.51 × 150.78
  4. Step 4: Simplify right side
    458.93x = 103,815.74
  5. Step 5: Solve for x
    x = 103,815.74/458.93
  6. Step 6: Final answer
    x = 226.21

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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.