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Finding the Fourth Proportional to 663.30, 993.90 and 525.99

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Solution

The fourth proportional to 663.30, 993.90 and 525.99 is: 788.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.30 : 993.90 = 525.99 : x
  2. Step 2: Convert to fraction form
    663.30/993.90 = 525.99/x
  3. Step 3: Cross multiply
    663.30x = 993.90 × 525.99
  4. Step 4: Simplify right side
    663.30x = 522,781.46
  5. Step 5: Solve for x
    x = 522,781.46/663.30
  6. Step 6: Final answer
    x = 788.15

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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.