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Finding the Fourth Proportional to 374.98, 562.70 and 143.89

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Solution

The fourth proportional to 374.98, 562.70 and 143.89 is: 215.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.98 : 562.70 = 143.89 : x
  2. Step 2: Convert to fraction form
    374.98/562.70 = 143.89/x
  3. Step 3: Cross multiply
    374.98x = 562.70 × 143.89
  4. Step 4: Simplify right side
    374.98x = 80,966.90
  5. Step 5: Solve for x
    x = 80,966.90/374.98
  6. Step 6: Final answer
    x = 215.92

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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.