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Finding the Fourth Proportional to 615.96, 923.21 and 609.11

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Solution

The fourth proportional to 615.96, 923.21 and 609.11 is: 912.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.96 : 923.21 = 609.11 : x
  2. Step 2: Convert to fraction form
    615.96/923.21 = 609.11/x
  3. Step 3: Cross multiply
    615.96x = 923.21 × 609.11
  4. Step 4: Simplify right side
    615.96x = 562,328.78
  5. Step 5: Solve for x
    x = 562,328.78/615.96
  6. Step 6: Final answer
    x = 912.93

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Double scale
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Similar ratio
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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.