Home / 1,515.79-2,089.07-1,122.13

Finding the Fourth Proportional to 1,515.79, 2,089.07 and 1,122.13

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Solution

The fourth proportional to 1,515.79, 2,089.07 and 1,122.13 is: 1,546.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.79 : 2,089.07 = 1,122.13 : x
  2. Step 2: Convert to fraction form
    1,515.79/2,089.07 = 1,122.13/x
  3. Step 3: Cross multiply
    1,515.79x = 2,089.07 × 1,122.13
  4. Step 4: Simplify right side
    1,515.79x = 2,344,192.06
  5. Step 5: Solve for x
    x = 2,344,192.06/1,515.79
  6. Step 6: Final answer
    x = 1,546.52

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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.