Home / 1,715.72-2,369.66-1,128.87

Finding the Fourth Proportional to 1,715.72, 2,369.66 and 1,128.87

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Solution

The fourth proportional to 1,715.72, 2,369.66 and 1,128.87 is: 1,559.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,715.72 : 2,369.66 = 1,128.87 : x
  2. Step 2: Convert to fraction form
    1,715.72/2,369.66 = 1,128.87/x
  3. Step 3: Cross multiply
    1,715.72x = 2,369.66 × 1,128.87
  4. Step 4: Simplify right side
    1,715.72x = 2,675,032.44
  5. Step 5: Solve for x
    x = 2,675,032.44/1,715.72
  6. Step 6: Final answer
    x = 1,559.14

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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.