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Finding the Fourth Proportional to 1,511.90, 2,268.11 and 471.88

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Solution

The fourth proportional to 1,511.90, 2,268.11 and 471.88 is: 707.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.90 : 2,268.11 = 471.88 : x
  2. Step 2: Convert to fraction form
    1,511.90/2,268.11 = 471.88/x
  3. Step 3: Cross multiply
    1,511.90x = 2,268.11 × 471.88
  4. Step 4: Simplify right side
    1,511.90x = 1,070,284.88
  5. Step 5: Solve for x
    x = 1,070,284.88/1,511.90
  6. Step 6: Final answer
    x = 707.91

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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.