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Finding the Fourth Proportional to 1,508.77, 2,263.12 and 687.26

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Solution

The fourth proportional to 1,508.77, 2,263.12 and 687.26 is: 1,030.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,508.77 : 2,263.12 = 687.26 : x
  2. Step 2: Convert to fraction form
    1,508.77/2,263.12 = 687.26/x
  3. Step 3: Cross multiply
    1,508.77x = 2,263.12 × 687.26
  4. Step 4: Simplify right side
    1,508.77x = 1,555,347.30
  5. Step 5: Solve for x
    x = 1,555,347.30/1,508.77
  6. Step 6: Final answer
    x = 1,030.87

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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.