Home / 1,391.42-2,087.13-1,116.16

Finding the Fourth Proportional to 1,391.42, 2,087.13 and 1,116.16

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Solution

The fourth proportional to 1,391.42, 2,087.13 and 1,116.16 is: 1,674.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.42 : 2,087.13 = 1,116.16 : x
  2. Step 2: Convert to fraction form
    1,391.42/2,087.13 = 1,116.16/x
  3. Step 3: Cross multiply
    1,391.42x = 2,087.13 × 1,116.16
  4. Step 4: Simplify right side
    1,391.42x = 2,329,569.99
  5. Step 5: Solve for x
    x = 2,329,569.99/1,391.42
  6. Step 6: Final answer
    x = 1,674.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.