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Finding the Fourth Proportional to 2,272.47, 3,410.19 and 811.65

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Solution

The fourth proportional to 2,272.47, 3,410.19 and 811.65 is: 1,218.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,272.47 : 3,410.19 = 811.65 : x
  2. Step 2: Convert to fraction form
    2,272.47/3,410.19 = 811.65/x
  3. Step 3: Cross multiply
    2,272.47x = 3,410.19 × 811.65
  4. Step 4: Simplify right side
    2,272.47x = 2,767,880.71
  5. Step 5: Solve for x
    x = 2,767,880.71/2,272.47
  6. Step 6: Final answer
    x = 1,218.01

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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.