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Finding the Fourth Proportional to 575.29, 862.94 and 142.45

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Solution

The fourth proportional to 575.29, 862.94 and 142.45 is: 213.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.29 : 862.94 = 142.45 : x
  2. Step 2: Convert to fraction form
    575.29/862.94 = 142.45/x
  3. Step 3: Cross multiply
    575.29x = 862.94 × 142.45
  4. Step 4: Simplify right side
    575.29x = 122,925.80
  5. Step 5: Solve for x
    x = 122,925.80/575.29
  6. Step 6: Final answer
    x = 213.68

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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.