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Finding the Fourth Proportional to 615.10, 922.64 and 249.78

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Solution

The fourth proportional to 615.10, 922.64 and 249.78 is: 374.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.10 : 922.64 = 249.78 : x
  2. Step 2: Convert to fraction form
    615.10/922.64 = 249.78/x
  3. Step 3: Cross multiply
    615.10x = 922.64 × 249.78
  4. Step 4: Simplify right side
    615.10x = 230,457.02
  5. Step 5: Solve for x
    x = 230,457.02/615.10
  6. Step 6: Final answer
    x = 374.67

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.