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Finding the Fourth Proportional to 2,046.80, 3,068.40 and 815.04

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Solution

The fourth proportional to 2,046.80, 3,068.40 and 815.04 is: 1,221.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,046.80 : 3,068.40 = 815.04 : x
  2. Step 2: Convert to fraction form
    2,046.80/3,068.40 = 815.04/x
  3. Step 3: Cross multiply
    2,046.80x = 3,068.40 × 815.04
  4. Step 4: Simplify right side
    2,046.80x = 2,500,868.74
  5. Step 5: Solve for x
    x = 2,500,868.74/2,046.80
  6. Step 6: Final answer
    x = 1,221.84

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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.