Home / 1,867.86-2,576.88-1,121.58

Finding the Fourth Proportional to 1,867.86, 2,576.88 and 1,121.58

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Solution

The fourth proportional to 1,867.86, 2,576.88 and 1,121.58 is: 1,547.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,867.86 : 2,576.88 = 1,121.58 : x
  2. Step 2: Convert to fraction form
    1,867.86/2,576.88 = 1,121.58/x
  3. Step 3: Cross multiply
    1,867.86x = 2,576.88 × 1,121.58
  4. Step 4: Simplify right side
    1,867.86x = 2,890,177.07
  5. Step 5: Solve for x
    x = 2,890,177.07/1,867.86
  6. Step 6: Final answer
    x = 1,547.32

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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.