Home / 2,979.79-4,110.65-1,985.16

Finding the Fourth Proportional to 2,979.79, 4,110.65 and 1,985.16

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Solution

The fourth proportional to 2,979.79, 4,110.65 and 1,985.16 is: 2,738.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.79 : 4,110.65 = 1,985.16 : x
  2. Step 2: Convert to fraction form
    2,979.79/4,110.65 = 1,985.16/x
  3. Step 3: Cross multiply
    2,979.79x = 4,110.65 × 1,985.16
  4. Step 4: Simplify right side
    2,979.79x = 8,160,287.77
  5. Step 5: Solve for x
    x = 8,160,287.77/2,979.79
  6. Step 6: Final answer
    x = 2,738.55

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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.