Home / 2,567.78-3,543.51-1,388.85

Finding the Fourth Proportional to 2,567.78, 3,543.51 and 1,388.85

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Solution

The fourth proportional to 2,567.78, 3,543.51 and 1,388.85 is: 1,916.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,567.78 : 3,543.51 = 1,388.85 : x
  2. Step 2: Convert to fraction form
    2,567.78/3,543.51 = 1,388.85/x
  3. Step 3: Cross multiply
    2,567.78x = 3,543.51 × 1,388.85
  4. Step 4: Simplify right side
    2,567.78x = 4,921,403.86
  5. Step 5: Solve for x
    x = 4,921,403.86/2,567.78
  6. Step 6: Final answer
    x = 1,916.60

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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.