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Finding the Fourth Proportional to 708.82, 1,062.42 and 670.36

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Solution

The fourth proportional to 708.82, 1,062.42 and 670.36 is: 1,004.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.82 : 1,062.42 = 670.36 : x
  2. Step 2: Convert to fraction form
    708.82/1,062.42 = 670.36/x
  3. Step 3: Cross multiply
    708.82x = 1,062.42 × 670.36
  4. Step 4: Simplify right side
    708.82x = 712,203.87
  5. Step 5: Solve for x
    x = 712,203.87/708.82
  6. Step 6: Final answer
    x = 1,004.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.