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Finding the Fourth Proportional to 1,151.82, 1,588.31 and 708.95

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Solution

The fourth proportional to 1,151.82, 1,588.31 and 708.95 is: 977.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.82 : 1,588.31 = 708.95 : x
  2. Step 2: Convert to fraction form
    1,151.82/1,588.31 = 708.95/x
  3. Step 3: Cross multiply
    1,151.82x = 1,588.31 × 708.95
  4. Step 4: Simplify right side
    1,151.82x = 1,126,035.46
  5. Step 5: Solve for x
    x = 1,126,035.46/1,151.82
  6. Step 6: Final answer
    x = 977.61

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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.