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Finding the Fourth Proportional to 1,010.72, 1,395.96 and 662.96

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Solution

The fourth proportional to 1,010.72, 1,395.96 and 662.96 is: 915.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.72 : 1,395.96 = 662.96 : x
  2. Step 2: Convert to fraction form
    1,010.72/1,395.96 = 662.96/x
  3. Step 3: Cross multiply
    1,010.72x = 1,395.96 × 662.96
  4. Step 4: Simplify right side
    1,010.72x = 925,465.64
  5. Step 5: Solve for x
    x = 925,465.64/1,010.72
  6. Step 6: Final answer
    x = 915.65

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.