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Finding the Fourth Proportional to 690.76, 1,033.71 and 527.14

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Solution

The fourth proportional to 690.76, 1,033.71 and 527.14 is: 788.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.76 : 1,033.71 = 527.14 : x
  2. Step 2: Convert to fraction form
    690.76/1,033.71 = 527.14/x
  3. Step 3: Cross multiply
    690.76x = 1,033.71 × 527.14
  4. Step 4: Simplify right side
    690.76x = 544,909.89
  5. Step 5: Solve for x
    x = 544,909.89/690.76
  6. Step 6: Final answer
    x = 788.86

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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.