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Finding the Fourth Proportional to 880.45, 1,321.67 and 556

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Solution

The fourth proportional to 880.45, 1,321.67 and 556 is: 834.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.45 : 1,321.67 = 556 : x
  2. Step 2: Convert to fraction form
    880.45/1,321.67 = 556/x
  3. Step 3: Cross multiply
    880.45x = 1,321.67 × 556
  4. Step 4: Simplify right side
    880.45x = 734,848.52
  5. Step 5: Solve for x
    x = 734,848.52/880.45
  6. Step 6: Final answer
    x = 834.63

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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.