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Finding the Fourth Proportional to 615.90, 923.91 and 291.09

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Solution

The fourth proportional to 615.90, 923.91 and 291.09 is: 436.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.90 : 923.91 = 291.09 : x
  2. Step 2: Convert to fraction form
    615.90/923.91 = 291.09/x
  3. Step 3: Cross multiply
    615.90x = 923.91 × 291.09
  4. Step 4: Simplify right side
    615.90x = 268,940.96
  5. Step 5: Solve for x
    x = 268,940.96/615.90
  6. Step 6: Final answer
    x = 436.66

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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.