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Finding the Fourth Proportional to 880.66, 1,321.80 and 556.26

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Solution

The fourth proportional to 880.66, 1,321.80 and 556.26 is: 834.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.66 : 1,321.80 = 556.26 : x
  2. Step 2: Convert to fraction form
    880.66/1,321.80 = 556.26/x
  3. Step 3: Cross multiply
    880.66x = 1,321.80 × 556.26
  4. Step 4: Simplify right side
    880.66x = 735,264.47
  5. Step 5: Solve for x
    x = 735,264.47/880.66
  6. Step 6: Final answer
    x = 834.90

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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.