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Finding the Fourth Proportional to 887.58, 1,329.53 and 521.24

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Solution

The fourth proportional to 887.58, 1,329.53 and 521.24 is: 780.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.58 : 1,329.53 = 521.24 : x
  2. Step 2: Convert to fraction form
    887.58/1,329.53 = 521.24/x
  3. Step 3: Cross multiply
    887.58x = 1,329.53 × 521.24
  4. Step 4: Simplify right side
    887.58x = 693,004.22
  5. Step 5: Solve for x
    x = 693,004.22/887.58
  6. Step 6: Final answer
    x = 780.78

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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.