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Finding the Fourth Proportional to 898.38, 1,239.57 and 604.35

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Solution

The fourth proportional to 898.38, 1,239.57 and 604.35 is: 833.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.38 : 1,239.57 = 604.35 : x
  2. Step 2: Convert to fraction form
    898.38/1,239.57 = 604.35/x
  3. Step 3: Cross multiply
    898.38x = 1,239.57 × 604.35
  4. Step 4: Simplify right side
    898.38x = 749,134.13
  5. Step 5: Solve for x
    x = 749,134.13/898.38
  6. Step 6: Final answer
    x = 833.87

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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.