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Finding the Fourth Proportional to 660.07, 909.39 and 528.85

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Solution

The fourth proportional to 660.07, 909.39 and 528.85 is: 728.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.07 : 909.39 = 528.85 : x
  2. Step 2: Convert to fraction form
    660.07/909.39 = 528.85/x
  3. Step 3: Cross multiply
    660.07x = 909.39 × 528.85
  4. Step 4: Simplify right side
    660.07x = 480,930.90
  5. Step 5: Solve for x
    x = 480,930.90/660.07
  6. Step 6: Final answer
    x = 728.61

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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.