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Finding the Fourth Proportional to 881.10, 1,320.78 and 555.66

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Solution

The fourth proportional to 881.10, 1,320.78 and 555.66 is: 832.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.10 : 1,320.78 = 555.66 : x
  2. Step 2: Convert to fraction form
    881.10/1,320.78 = 555.66/x
  3. Step 3: Cross multiply
    881.10x = 1,320.78 × 555.66
  4. Step 4: Simplify right side
    881.10x = 733,904.61
  5. Step 5: Solve for x
    x = 733,904.61/881.10
  6. Step 6: Final answer
    x = 832.94

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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.