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Finding the Fourth Proportional to 1,617.62, 2,232.30 and 918.99

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Solution

The fourth proportional to 1,617.62, 2,232.30 and 918.99 is: 1,268.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.62 : 2,232.30 = 918.99 : x
  2. Step 2: Convert to fraction form
    1,617.62/2,232.30 = 918.99/x
  3. Step 3: Cross multiply
    1,617.62x = 2,232.30 × 918.99
  4. Step 4: Simplify right side
    1,617.62x = 2,051,466.96
  5. Step 5: Solve for x
    x = 2,051,466.96/1,617.62
  6. Step 6: Final answer
    x = 1,268.20

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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.