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Finding the Fourth Proportional to 615.20, 848.77 and 394.27

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Solution

The fourth proportional to 615.20, 848.77 and 394.27 is: 543.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.20 : 848.77 = 394.27 : x
  2. Step 2: Convert to fraction form
    615.20/848.77 = 394.27/x
  3. Step 3: Cross multiply
    615.20x = 848.77 × 394.27
  4. Step 4: Simplify right side
    615.20x = 334,646.54
  5. Step 5: Solve for x
    x = 334,646.54/615.20
  6. Step 6: Final answer
    x = 543.96

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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.