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Finding the Fourth Proportional to 1,003.34, 1,385 and 898.24

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Solution

The fourth proportional to 1,003.34, 1,385 and 898.24 is: 1,239.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.34 : 1,385 = 898.24 : x
  2. Step 2: Convert to fraction form
    1,003.34/1,385 = 898.24/x
  3. Step 3: Cross multiply
    1,003.34x = 1,385 × 898.24
  4. Step 4: Simplify right side
    1,003.34x = 1,244,062.40
  5. Step 5: Solve for x
    x = 1,244,062.40/1,003.34
  6. Step 6: Final answer
    x = 1,239.92

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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.