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Finding the Fourth Proportional to 832.56, 1,148.20 and 708.63

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Solution

The fourth proportional to 832.56, 1,148.20 and 708.63 is: 977.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.56 : 1,148.20 = 708.63 : x
  2. Step 2: Convert to fraction form
    832.56/1,148.20 = 708.63/x
  3. Step 3: Cross multiply
    832.56x = 1,148.20 × 708.63
  4. Step 4: Simplify right side
    832.56x = 813,648.97
  5. Step 5: Solve for x
    x = 813,648.97/832.56
  6. Step 6: Final answer
    x = 977.29

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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.