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Finding the Fourth Proportional to 572.48, 789.76 and 339.52

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Solution

The fourth proportional to 572.48, 789.76 and 339.52 is: 468.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.48 : 789.76 = 339.52 : x
  2. Step 2: Convert to fraction form
    572.48/789.76 = 339.52/x
  3. Step 3: Cross multiply
    572.48x = 789.76 × 339.52
  4. Step 4: Simplify right side
    572.48x = 268,139.32
  5. Step 5: Solve for x
    x = 268,139.32/572.48
  6. Step 6: Final answer
    x = 468.38

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.