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Finding the Fourth Proportional to 707.44, 1,061.12 and 187.42

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Solution

The fourth proportional to 707.44, 1,061.12 and 187.42 is: 281.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.44 : 1,061.12 = 187.42 : x
  2. Step 2: Convert to fraction form
    707.44/1,061.12 = 187.42/x
  3. Step 3: Cross multiply
    707.44x = 1,061.12 × 187.42
  4. Step 4: Simplify right side
    707.44x = 198,875.11
  5. Step 5: Solve for x
    x = 198,875.11/707.44
  6. Step 6: Final answer
    x = 281.12

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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.