Home / 1,617.04-2,231.67-918.55

Finding the Fourth Proportional to 1,617.04, 2,231.67 and 918.55

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Solution

The fourth proportional to 1,617.04, 2,231.67 and 918.55 is: 1,267.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.04 : 2,231.67 = 918.55 : x
  2. Step 2: Convert to fraction form
    1,617.04/2,231.67 = 918.55/x
  3. Step 3: Cross multiply
    1,617.04x = 2,231.67 × 918.55
  4. Step 4: Simplify right side
    1,617.04x = 2,049,900.48
  5. Step 5: Solve for x
    x = 2,049,900.48/1,617.04
  6. Step 6: Final answer
    x = 1,267.69

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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.