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Finding the Fourth Proportional to 615.15, 922.94 and 290.54

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Solution

The fourth proportional to 615.15, 922.94 and 290.54 is: 435.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.15 : 922.94 = 290.54 : x
  2. Step 2: Convert to fraction form
    615.15/922.94 = 290.54/x
  3. Step 3: Cross multiply
    615.15x = 922.94 × 290.54
  4. Step 4: Simplify right side
    615.15x = 268,144.92
  5. Step 5: Solve for x
    x = 268,144.92/615.15
  6. Step 6: Final answer
    x = 435.90

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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.