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Finding the Fourth Proportional to 1,000.89, 1,381.50 and 650.97

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Solution

The fourth proportional to 1,000.89, 1,381.50 and 650.97 is: 898.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.89 : 1,381.50 = 650.97 : x
  2. Step 2: Convert to fraction form
    1,000.89/1,381.50 = 650.97/x
  3. Step 3: Cross multiply
    1,000.89x = 1,381.50 × 650.97
  4. Step 4: Simplify right side
    1,000.89x = 899,315.06
  5. Step 5: Solve for x
    x = 899,315.06/1,000.89
  6. Step 6: Final answer
    x = 898.52

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Why These Related Problems?

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