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Finding the Fourth Proportional to 815.68, 1,125.73 and 484.19

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Solution

The fourth proportional to 815.68, 1,125.73 and 484.19 is: 668.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.68 : 1,125.73 = 484.19 : x
  2. Step 2: Convert to fraction form
    815.68/1,125.73 = 484.19/x
  3. Step 3: Cross multiply
    815.68x = 1,125.73 × 484.19
  4. Step 4: Simplify right side
    815.68x = 545,067.21
  5. Step 5: Solve for x
    x = 545,067.21/815.68
  6. Step 6: Final answer
    x = 668.24

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.