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Finding the Fourth Proportional to 887.82, 1,330.91 and 339.58

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Solution

The fourth proportional to 887.82, 1,330.91 and 339.58 is: 509.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.82 : 1,330.91 = 339.58 : x
  2. Step 2: Convert to fraction form
    887.82/1,330.91 = 339.58/x
  3. Step 3: Cross multiply
    887.82x = 1,330.91 × 339.58
  4. Step 4: Simplify right side
    887.82x = 451,950.42
  5. Step 5: Solve for x
    x = 451,950.42/887.82
  6. Step 6: Final answer
    x = 509.06

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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.