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Finding the Fourth Proportional to 754.08, 1,040.62 and 692.16

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Solution

The fourth proportional to 754.08, 1,040.62 and 692.16 is: 955.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.08 : 1,040.62 = 692.16 : x
  2. Step 2: Convert to fraction form
    754.08/1,040.62 = 692.16/x
  3. Step 3: Cross multiply
    754.08x = 1,040.62 × 692.16
  4. Step 4: Simplify right side
    754.08x = 720,275.54
  5. Step 5: Solve for x
    x = 720,275.54/754.08
  6. Step 6: Final answer
    x = 955.17

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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.