Home / 1,405.32-2,099.43-1,117.08

Finding the Fourth Proportional to 1,405.32, 2,099.43 and 1,117.08

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Solution

The fourth proportional to 1,405.32, 2,099.43 and 1,117.08 is: 1,668.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.32 : 2,099.43 = 1,117.08 : x
  2. Step 2: Convert to fraction form
    1,405.32/2,099.43 = 1,117.08/x
  3. Step 3: Cross multiply
    1,405.32x = 2,099.43 × 1,117.08
  4. Step 4: Simplify right side
    1,405.32x = 2,345,231.26
  5. Step 5: Solve for x
    x = 2,345,231.26/1,405.32
  6. Step 6: Final answer
    x = 1,668.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.