Home / 3,172.10-4,758.86-981.05

Finding the Fourth Proportional to 3,172.10, 4,758.86 and 981.05

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Solution

The fourth proportional to 3,172.10, 4,758.86 and 981.05 is: 1,471.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.10 : 4,758.86 = 981.05 : x
  2. Step 2: Convert to fraction form
    3,172.10/4,758.86 = 981.05/x
  3. Step 3: Cross multiply
    3,172.10x = 4,758.86 × 981.05
  4. Step 4: Simplify right side
    3,172.10x = 4,668,693.95
  5. Step 5: Solve for x
    x = 4,668,693.95/3,172.10
  6. Step 6: Final answer
    x = 1,471.80

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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.