Home / 2,567.15-3,542.65-1,388.21

Finding the Fourth Proportional to 2,567.15, 3,542.65 and 1,388.21

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Solution

The fourth proportional to 2,567.15, 3,542.65 and 1,388.21 is: 1,915.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,567.15 : 3,542.65 = 1,388.21 : x
  2. Step 2: Convert to fraction form
    2,567.15/3,542.65 = 1,388.21/x
  3. Step 3: Cross multiply
    2,567.15x = 3,542.65 × 1,388.21
  4. Step 4: Simplify right side
    2,567.15x = 4,917,942.16
  5. Step 5: Solve for x
    x = 4,917,942.16/2,567.15
  6. Step 6: Final answer
    x = 1,915.72

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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.