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Finding the Fourth Proportional to 887.71, 1,330.09 and 539.99

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Solution

The fourth proportional to 887.71, 1,330.09 and 539.99 is: 809.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.71 : 1,330.09 = 539.99 : x
  2. Step 2: Convert to fraction form
    887.71/1,330.09 = 539.99/x
  3. Step 3: Cross multiply
    887.71x = 1,330.09 × 539.99
  4. Step 4: Simplify right side
    887.71x = 718,235.68
  5. Step 5: Solve for x
    x = 718,235.68/887.71
  6. Step 6: Final answer
    x = 809.09

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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.