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Finding the Fourth Proportional to 1,213.66, 1,821.24 and 555.43

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Solution

The fourth proportional to 1,213.66, 1,821.24 and 555.43 is: 833.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.66 : 1,821.24 = 555.43 : x
  2. Step 2: Convert to fraction form
    1,213.66/1,821.24 = 555.43/x
  3. Step 3: Cross multiply
    1,213.66x = 1,821.24 × 555.43
  4. Step 4: Simplify right side
    1,213.66x = 1,011,560.84
  5. Step 5: Solve for x
    x = 1,011,560.84/1,213.66
  6. Step 6: Final answer
    x = 833.48

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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.