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Finding the Fourth Proportional to 277.76, 383.04 and 215.50

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Solution

The fourth proportional to 277.76, 383.04 and 215.50 is: 297.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.76 : 383.04 = 215.50 : x
  2. Step 2: Convert to fraction form
    277.76/383.04 = 215.50/x
  3. Step 3: Cross multiply
    277.76x = 383.04 × 215.50
  4. Step 4: Simplify right side
    277.76x = 82,545.12
  5. Step 5: Solve for x
    x = 82,545.12/277.76
  6. Step 6: Final answer
    x = 297.18

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.