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Finding the Fourth Proportional to 652.56, 978.20 and 268.08

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Solution

The fourth proportional to 652.56, 978.20 and 268.08 is: 401.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.56 : 978.20 = 268.08 : x
  2. Step 2: Convert to fraction form
    652.56/978.20 = 268.08/x
  3. Step 3: Cross multiply
    652.56x = 978.20 × 268.08
  4. Step 4: Simplify right side
    652.56x = 262,235.86
  5. Step 5: Solve for x
    x = 262,235.86/652.56
  6. Step 6: Final answer
    x = 401.86

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.