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Finding the Fourth Proportional to 1,616.64, 2,230.97 and 917.88

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Solution

The fourth proportional to 1,616.64, 2,230.97 and 917.88 is: 1,266.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,616.64 : 2,230.97 = 917.88 : x
  2. Step 2: Convert to fraction form
    1,616.64/2,230.97 = 917.88/x
  3. Step 3: Cross multiply
    1,616.64x = 2,230.97 × 917.88
  4. Step 4: Simplify right side
    1,616.64x = 2,047,762.74
  5. Step 5: Solve for x
    x = 2,047,762.74/1,616.64
  6. Step 6: Final answer
    x = 1,266.68

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1.5x scale

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.