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Finding the Fourth Proportional to 928.27, 1,390.77 and 562.33

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Solution

The fourth proportional to 928.27, 1,390.77 and 562.33 is: 842.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.27 : 1,390.77 = 562.33 : x
  2. Step 2: Convert to fraction form
    928.27/1,390.77 = 562.33/x
  3. Step 3: Cross multiply
    928.27x = 1,390.77 × 562.33
  4. Step 4: Simplify right side
    928.27x = 782,065.61
  5. Step 5: Solve for x
    x = 782,065.61/928.27
  6. Step 6: Final answer
    x = 842.50

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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.