Home / 2,885.10-3,979.26-2,487.45

Finding the Fourth Proportional to 2,885.10, 3,979.26 and 2,487.45

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Solution

The fourth proportional to 2,885.10, 3,979.26 and 2,487.45 is: 3,430.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,885.10 : 3,979.26 = 2,487.45 : x
  2. Step 2: Convert to fraction form
    2,885.10/3,979.26 = 2,487.45/x
  3. Step 3: Cross multiply
    2,885.10x = 3,979.26 × 2,487.45
  4. Step 4: Simplify right side
    2,885.10x = 9,898,210.29
  5. Step 5: Solve for x
    x = 9,898,210.29/2,885.10
  6. Step 6: Final answer
    x = 3,430.80

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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.