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Finding the Fourth Proportional to 1,517.12, 2,094.48 and 928

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Solution

The fourth proportional to 1,517.12, 2,094.48 and 928 is: 1,281.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.12 : 2,094.48 = 928 : x
  2. Step 2: Convert to fraction form
    1,517.12/2,094.48 = 928/x
  3. Step 3: Cross multiply
    1,517.12x = 2,094.48 × 928
  4. Step 4: Simplify right side
    1,517.12x = 1,943,677.44
  5. Step 5: Solve for x
    x = 1,943,677.44/1,517.12
  6. Step 6: Final answer
    x = 1,281.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.