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Finding the Fourth Proportional to 674.79, 1,012.18 and 187.83

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Solution

The fourth proportional to 674.79, 1,012.18 and 187.83 is: 281.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.79 : 1,012.18 = 187.83 : x
  2. Step 2: Convert to fraction form
    674.79/1,012.18 = 187.83/x
  3. Step 3: Cross multiply
    674.79x = 1,012.18 × 187.83
  4. Step 4: Simplify right side
    674.79x = 190,112.71
  5. Step 5: Solve for x
    x = 190,112.71/674.79
  6. Step 6: Final answer
    x = 281.74

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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.