Home / 2,115.25-2,918.95-1,158.14

Finding the Fourth Proportional to 2,115.25, 2,918.95 and 1,158.14

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Solution

The fourth proportional to 2,115.25, 2,918.95 and 1,158.14 is: 1,598.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.25 : 2,918.95 = 1,158.14 : x
  2. Step 2: Convert to fraction form
    2,115.25/2,918.95 = 1,158.14/x
  3. Step 3: Cross multiply
    2,115.25x = 2,918.95 × 1,158.14
  4. Step 4: Simplify right side
    2,115.25x = 3,380,557.16
  5. Step 5: Solve for x
    x = 3,380,557.16/2,115.25
  6. Step 6: Final answer
    x = 1,598.18

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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.