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Finding the Fourth Proportional to 708.03, 1,058.25 and 638.46

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Solution

The fourth proportional to 708.03, 1,058.25 and 638.46 is: 954.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.03 : 1,058.25 = 638.46 : x
  2. Step 2: Convert to fraction form
    708.03/1,058.25 = 638.46/x
  3. Step 3: Cross multiply
    708.03x = 1,058.25 × 638.46
  4. Step 4: Simplify right side
    708.03x = 675,650.30
  5. Step 5: Solve for x
    x = 675,650.30/708.03
  6. Step 6: Final answer
    x = 954.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.