Home / 2,126.55-2,934.18-1,287.09

Finding the Fourth Proportional to 2,126.55, 2,934.18 and 1,287.09

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Solution

The fourth proportional to 2,126.55, 2,934.18 and 1,287.09 is: 1,775.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.55 : 2,934.18 = 1,287.09 : x
  2. Step 2: Convert to fraction form
    2,126.55/2,934.18 = 1,287.09/x
  3. Step 3: Cross multiply
    2,126.55x = 2,934.18 × 1,287.09
  4. Step 4: Simplify right side
    2,126.55x = 3,776,547.56
  5. Step 5: Solve for x
    x = 3,776,547.56/2,126.55
  6. Step 6: Final answer
    x = 1,775.90

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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.