Home / 1,617.10-2,231.60-918.47

Finding the Fourth Proportional to 1,617.10, 2,231.60 and 918.47

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Solution

The fourth proportional to 1,617.10, 2,231.60 and 918.47 is: 1,267.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.10 : 2,231.60 = 918.47 : x
  2. Step 2: Convert to fraction form
    1,617.10/2,231.60 = 918.47/x
  3. Step 3: Cross multiply
    1,617.10x = 2,231.60 × 918.47
  4. Step 4: Simplify right side
    1,617.10x = 2,049,657.65
  5. Step 5: Solve for x
    x = 2,049,657.65/1,617.10
  6. Step 6: Final answer
    x = 1,267.49

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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.