Home / 1,617.39-2,231.82-918.63

Finding the Fourth Proportional to 1,617.39, 2,231.82 and 918.63

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Solution

The fourth proportional to 1,617.39, 2,231.82 and 918.63 is: 1,267.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.39 : 2,231.82 = 918.63 : x
  2. Step 2: Convert to fraction form
    1,617.39/2,231.82 = 918.63/x
  3. Step 3: Cross multiply
    1,617.39x = 2,231.82 × 918.63
  4. Step 4: Simplify right side
    1,617.39x = 2,050,216.81
  5. Step 5: Solve for x
    x = 2,050,216.81/1,617.39
  6. Step 6: Final answer
    x = 1,267.61

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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.