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Finding the Fourth Proportional to 1,476.80, 2,215.55 and 552.39

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Solution

The fourth proportional to 1,476.80, 2,215.55 and 552.39 is: 828.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,476.80 : 2,215.55 = 552.39 : x
  2. Step 2: Convert to fraction form
    1,476.80/2,215.55 = 552.39/x
  3. Step 3: Cross multiply
    1,476.80x = 2,215.55 × 552.39
  4. Step 4: Simplify right side
    1,476.80x = 1,223,847.66
  5. Step 5: Solve for x
    x = 1,223,847.66/1,476.80
  6. Step 6: Final answer
    x = 828.72

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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.