Home / 2,508.78-3,461.80-1,389.55

Finding the Fourth Proportional to 2,508.78, 3,461.80 and 1,389.55

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Solution

The fourth proportional to 2,508.78, 3,461.80 and 1,389.55 is: 1,917.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,508.78 : 3,461.80 = 1,389.55 : x
  2. Step 2: Convert to fraction form
    2,508.78/3,461.80 = 1,389.55/x
  3. Step 3: Cross multiply
    2,508.78x = 3,461.80 × 1,389.55
  4. Step 4: Simplify right side
    2,508.78x = 4,810,344.19
  5. Step 5: Solve for x
    x = 4,810,344.19/2,508.78
  6. Step 6: Final answer
    x = 1,917.40

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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.