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Finding the Fourth Proportional to 880.36, 1,318.58 and 855.66

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Solution

The fourth proportional to 880.36, 1,318.58 and 855.66 is: 1,281.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.36 : 1,318.58 = 855.66 : x
  2. Step 2: Convert to fraction form
    880.36/1,318.58 = 855.66/x
  3. Step 3: Cross multiply
    880.36x = 1,318.58 × 855.66
  4. Step 4: Simplify right side
    880.36x = 1,128,256.16
  5. Step 5: Solve for x
    x = 1,128,256.16/880.36
  6. Step 6: Final answer
    x = 1,281.58

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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.