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Finding the Fourth Proportional to 1,616.17, 2,230.32 and 917.50

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Solution

The fourth proportional to 1,616.17, 2,230.32 and 917.50 is: 1,266.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,616.17 : 2,230.32 = 917.50 : x
  2. Step 2: Convert to fraction form
    1,616.17/2,230.32 = 917.50/x
  3. Step 3: Cross multiply
    1,616.17x = 2,230.32 × 917.50
  4. Step 4: Simplify right side
    1,616.17x = 2,046,318.60
  5. Step 5: Solve for x
    x = 2,046,318.60/1,616.17
  6. Step 6: Final answer
    x = 1,266.15

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Why These Related Problems?

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