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Finding the Fourth Proportional to 1,122.88, 1,684.40 and 301.15

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Solution

The fourth proportional to 1,122.88, 1,684.40 and 301.15 is: 451.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.88 : 1,684.40 = 301.15 : x
  2. Step 2: Convert to fraction form
    1,122.88/1,684.40 = 301.15/x
  3. Step 3: Cross multiply
    1,122.88x = 1,684.40 × 301.15
  4. Step 4: Simplify right side
    1,122.88x = 507,257.06
  5. Step 5: Solve for x
    x = 507,257.06/1,122.88
  6. Step 6: Final answer
    x = 451.75

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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.