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Finding the Fourth Proportional to 572.48, 789.56 and 446.20

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Solution

The fourth proportional to 572.48, 789.56 and 446.20 is: 615.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.48 : 789.56 = 446.20 : x
  2. Step 2: Convert to fraction form
    572.48/789.56 = 446.20/x
  3. Step 3: Cross multiply
    572.48x = 789.56 × 446.20
  4. Step 4: Simplify right side
    572.48x = 352,295.49
  5. Step 5: Solve for x
    x = 352,295.49/572.48
  6. Step 6: Final answer
    x = 615.38

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Double scale
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1.5x scale

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.