Home / 2,877.59-3,970.80-1,618.70

Finding the Fourth Proportional to 2,877.59, 3,970.80 and 1,618.70

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Solution

The fourth proportional to 2,877.59, 3,970.80 and 1,618.70 is: 2,233.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,877.59 : 3,970.80 = 1,618.70 : x
  2. Step 2: Convert to fraction form
    2,877.59/3,970.80 = 1,618.70/x
  3. Step 3: Cross multiply
    2,877.59x = 3,970.80 × 1,618.70
  4. Step 4: Simplify right side
    2,877.59x = 6,427,514.11
  5. Step 5: Solve for x
    x = 6,427,514.11/2,877.59
  6. Step 6: Final answer
    x = 2,233.64

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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.