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Finding the Fourth Proportional to 572.08, 861.12 and 436.80

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Solution

The fourth proportional to 572.08, 861.12 and 436.80 is: 657.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.08 : 861.12 = 436.80 : x
  2. Step 2: Convert to fraction form
    572.08/861.12 = 436.80/x
  3. Step 3: Cross multiply
    572.08x = 861.12 × 436.80
  4. Step 4: Simplify right side
    572.08x = 376,137.22
  5. Step 5: Solve for x
    x = 376,137.22/572.08
  6. Step 6: Final answer
    x = 657.49

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.