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Finding the Fourth Proportional to 888.39, 1,331.51 and 340.11

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Solution

The fourth proportional to 888.39, 1,331.51 and 340.11 is: 509.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.39 : 1,331.51 = 340.11 : x
  2. Step 2: Convert to fraction form
    888.39/1,331.51 = 340.11/x
  3. Step 3: Cross multiply
    888.39x = 1,331.51 × 340.11
  4. Step 4: Simplify right side
    888.39x = 452,858.17
  5. Step 5: Solve for x
    x = 452,858.17/888.39
  6. Step 6: Final answer
    x = 509.75

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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.