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Finding the Fourth Proportional to 708.13, 1,057.33 and 576.64

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Solution

The fourth proportional to 708.13, 1,057.33 and 576.64 is: 861.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.13 : 1,057.33 = 576.64 : x
  2. Step 2: Convert to fraction form
    708.13/1,057.33 = 576.64/x
  3. Step 3: Cross multiply
    708.13x = 1,057.33 × 576.64
  4. Step 4: Simplify right side
    708.13x = 609,694.69
  5. Step 5: Solve for x
    x = 609,694.69/708.13
  6. Step 6: Final answer
    x = 861.00

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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.