Home / 2,875.13-4,305.73-1,638.78

Finding the Fourth Proportional to 2,875.13, 4,305.73 and 1,638.78

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Solution

The fourth proportional to 2,875.13, 4,305.73 and 1,638.78 is: 2,454.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,875.13 : 4,305.73 = 1,638.78 : x
  2. Step 2: Convert to fraction form
    2,875.13/4,305.73 = 1,638.78/x
  3. Step 3: Cross multiply
    2,875.13x = 4,305.73 × 1,638.78
  4. Step 4: Simplify right side
    2,875.13x = 7,056,144.21
  5. Step 5: Solve for x
    x = 7,056,144.21/2,875.13
  6. Step 6: Final answer
    x = 2,454.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.