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Finding the Fourth Proportional to 821.88, 1,232.55 and 529.70

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Solution

The fourth proportional to 821.88, 1,232.55 and 529.70 is: 794.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    821.88 : 1,232.55 = 529.70 : x
  2. Step 2: Convert to fraction form
    821.88/1,232.55 = 529.70/x
  3. Step 3: Cross multiply
    821.88x = 1,232.55 × 529.70
  4. Step 4: Simplify right side
    821.88x = 652,875.57
  5. Step 5: Solve for x
    x = 652,875.57/821.88
  6. Step 6: Final answer
    x = 794.37

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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.