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Finding the Fourth Proportional to 988.22, 1,479.08 and 880.22

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Solution

The fourth proportional to 988.22, 1,479.08 and 880.22 is: 1,317.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.22 : 1,479.08 = 880.22 : x
  2. Step 2: Convert to fraction form
    988.22/1,479.08 = 880.22/x
  3. Step 3: Cross multiply
    988.22x = 1,479.08 × 880.22
  4. Step 4: Simplify right side
    988.22x = 1,301,915.80
  5. Step 5: Solve for x
    x = 1,301,915.80/988.22
  6. Step 6: Final answer
    x = 1,317.44

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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.