Home / 2,272.16-3,405.40-972.12

Finding the Fourth Proportional to 2,272.16, 3,405.40 and 972.12

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Solution

The fourth proportional to 2,272.16, 3,405.40 and 972.12 is: 1,456.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,272.16 : 3,405.40 = 972.12 : x
  2. Step 2: Convert to fraction form
    2,272.16/3,405.40 = 972.12/x
  3. Step 3: Cross multiply
    2,272.16x = 3,405.40 × 972.12
  4. Step 4: Simplify right side
    2,272.16x = 3,310,457.45
  5. Step 5: Solve for x
    x = 3,310,457.45/2,272.16
  6. Step 6: Final answer
    x = 1,456.96

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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.