Home / 1,117.13-1,540.24-718.09

Finding the Fourth Proportional to 1,117.13, 1,540.24 and 718.09

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Solution

The fourth proportional to 1,117.13, 1,540.24 and 718.09 is: 990.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.13 : 1,540.24 = 718.09 : x
  2. Step 2: Convert to fraction form
    1,117.13/1,540.24 = 718.09/x
  3. Step 3: Cross multiply
    1,117.13x = 1,540.24 × 718.09
  4. Step 4: Simplify right side
    1,117.13x = 1,106,030.94
  5. Step 5: Solve for x
    x = 1,106,030.94/1,117.13
  6. Step 6: Final answer
    x = 990.06

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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.