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Finding the Fourth Proportional to 708.57, 1,062.65 and 275.63

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Solution

The fourth proportional to 708.57, 1,062.65 and 275.63 is: 413.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.57 : 1,062.65 = 275.63 : x
  2. Step 2: Convert to fraction form
    708.57/1,062.65 = 275.63/x
  3. Step 3: Cross multiply
    708.57x = 1,062.65 × 275.63
  4. Step 4: Simplify right side
    708.57x = 292,893.60
  5. Step 5: Solve for x
    x = 292,893.60/708.57
  6. Step 6: Final answer
    x = 413.36

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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.