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Finding the Fourth Proportional to 690.84, 1,033.92 and 527.56

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Solution

The fourth proportional to 690.84, 1,033.92 and 527.56 is: 789.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.84 : 1,033.92 = 527.56 : x
  2. Step 2: Convert to fraction form
    690.84/1,033.92 = 527.56/x
  3. Step 3: Cross multiply
    690.84x = 1,033.92 × 527.56
  4. Step 4: Simplify right side
    690.84x = 545,454.84
  5. Step 5: Solve for x
    x = 545,454.84/690.84
  6. Step 6: Final answer
    x = 789.55

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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.