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Finding the Fourth Proportional to 3,009.32, 4,513.47 and 818.21

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Solution

The fourth proportional to 3,009.32, 4,513.47 and 818.21 is: 1,227.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,009.32 : 4,513.47 = 818.21 : x
  2. Step 2: Convert to fraction form
    3,009.32/4,513.47 = 818.21/x
  3. Step 3: Cross multiply
    3,009.32x = 4,513.47 × 818.21
  4. Step 4: Simplify right side
    3,009.32x = 3,692,943.72
  5. Step 5: Solve for x
    x = 3,692,943.72/3,009.32
  6. Step 6: Final answer
    x = 1,227.17

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Double scale
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Similar ratio
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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.