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Finding the Fourth Proportional to 677.36, 934.20 and 572.70

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Solution

The fourth proportional to 677.36, 934.20 and 572.70 is: 789.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.36 : 934.20 = 572.70 : x
  2. Step 2: Convert to fraction form
    677.36/934.20 = 572.70/x
  3. Step 3: Cross multiply
    677.36x = 934.20 × 572.70
  4. Step 4: Simplify right side
    677.36x = 535,016.34
  5. Step 5: Solve for x
    x = 535,016.34/677.36
  6. Step 6: Final answer
    x = 789.86

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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.