Home / 1,617.14-2,231.61-918.50

Finding the Fourth Proportional to 1,617.14, 2,231.61 and 918.50

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Solution

The fourth proportional to 1,617.14, 2,231.61 and 918.50 is: 1,267.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.14 : 2,231.61 = 918.50 : x
  2. Step 2: Convert to fraction form
    1,617.14/2,231.61 = 918.50/x
  3. Step 3: Cross multiply
    1,617.14x = 2,231.61 × 918.50
  4. Step 4: Simplify right side
    1,617.14x = 2,049,733.79
  5. Step 5: Solve for x
    x = 2,049,733.79/1,617.14
  6. Step 6: Final answer
    x = 1,267.51

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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.