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Finding the Fourth Proportional to 1,042.79, 1,439.01 and 600.77

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Solution

The fourth proportional to 1,042.79, 1,439.01 and 600.77 is: 829.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.79 : 1,439.01 = 600.77 : x
  2. Step 2: Convert to fraction form
    1,042.79/1,439.01 = 600.77/x
  3. Step 3: Cross multiply
    1,042.79x = 1,439.01 × 600.77
  4. Step 4: Simplify right side
    1,042.79x = 864,514.04
  5. Step 5: Solve for x
    x = 864,514.04/1,042.79
  6. Step 6: Final answer
    x = 829.04

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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.