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Finding the Fourth Proportional to 1,042.91, 1,439.48 and 650.39

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Solution

The fourth proportional to 1,042.91, 1,439.48 and 650.39 is: 897.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.91 : 1,439.48 = 650.39 : x
  2. Step 2: Convert to fraction form
    1,042.91/1,439.48 = 650.39/x
  3. Step 3: Cross multiply
    1,042.91x = 1,439.48 × 650.39
  4. Step 4: Simplify right side
    1,042.91x = 936,223.40
  5. Step 5: Solve for x
    x = 936,223.40/1,042.91
  6. Step 6: Final answer
    x = 897.70

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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.