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Finding the Fourth Proportional to 1,089.56, 1,504.24 and 717.19

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Solution

The fourth proportional to 1,089.56, 1,504.24 and 717.19 is: 990.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.56 : 1,504.24 = 717.19 : x
  2. Step 2: Convert to fraction form
    1,089.56/1,504.24 = 717.19/x
  3. Step 3: Cross multiply
    1,089.56x = 1,504.24 × 717.19
  4. Step 4: Simplify right side
    1,089.56x = 1,078,820.33
  5. Step 5: Solve for x
    x = 1,078,820.33/1,089.56
  6. Step 6: Final answer
    x = 990.14

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Double scale
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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.