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Finding the Fourth Proportional to 868.77, 1,296.63 and 751.12

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Solution

The fourth proportional to 868.77, 1,296.63 and 751.12 is: 1,121.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.77 : 1,296.63 = 751.12 : x
  2. Step 2: Convert to fraction form
    868.77/1,296.63 = 751.12/x
  3. Step 3: Cross multiply
    868.77x = 1,296.63 × 751.12
  4. Step 4: Simplify right side
    868.77x = 973,921.48
  5. Step 5: Solve for x
    x = 973,921.48/868.77
  6. Step 6: Final answer
    x = 1,121.03

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1.5x scale

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.