Home / 3,278.80-4,921.40-1,637.20

Finding the Fourth Proportional to 3,278.80, 4,921.40 and 1,637.20

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Solution

The fourth proportional to 3,278.80, 4,921.40 and 1,637.20 is: 2,457.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,278.80 : 4,921.40 = 1,637.20 : x
  2. Step 2: Convert to fraction form
    3,278.80/4,921.40 = 1,637.20/x
  3. Step 3: Cross multiply
    3,278.80x = 4,921.40 × 1,637.20
  4. Step 4: Simplify right side
    3,278.80x = 8,057,316.08
  5. Step 5: Solve for x
    x = 8,057,316.08/3,278.80
  6. Step 6: Final answer
    x = 2,457.40

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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.