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Finding the Fourth Proportional to 712.91, 1,064.23 and 608.34

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Solution

The fourth proportional to 712.91, 1,064.23 and 608.34 is: 908.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.91 : 1,064.23 = 608.34 : x
  2. Step 2: Convert to fraction form
    712.91/1,064.23 = 608.34/x
  3. Step 3: Cross multiply
    712.91x = 1,064.23 × 608.34
  4. Step 4: Simplify right side
    712.91x = 647,413.37
  5. Step 5: Solve for x
    x = 647,413.37/712.91
  6. Step 6: Final answer
    x = 908.13

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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.