Home / 2,100.04-3,149.60-638.80

Finding the Fourth Proportional to 2,100.04, 3,149.60 and 638.80

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Solution

The fourth proportional to 2,100.04, 3,149.60 and 638.80 is: 958.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,100.04 : 3,149.60 = 638.80 : x
  2. Step 2: Convert to fraction form
    2,100.04/3,149.60 = 638.80/x
  3. Step 3: Cross multiply
    2,100.04x = 3,149.60 × 638.80
  4. Step 4: Simplify right side
    2,100.04x = 2,011,964.48
  5. Step 5: Solve for x
    x = 2,011,964.48/2,100.04
  6. Step 6: Final answer
    x = 958.06

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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.