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Finding the Fourth Proportional to 663.95, 993.50 and 555.82

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Solution

The fourth proportional to 663.95, 993.50 and 555.82 is: 831.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.95 : 993.50 = 555.82 : x
  2. Step 2: Convert to fraction form
    663.95/993.50 = 555.82/x
  3. Step 3: Cross multiply
    663.95x = 993.50 × 555.82
  4. Step 4: Simplify right side
    663.95x = 552,203.99
  5. Step 5: Solve for x
    x = 552,203.99/663.95
  6. Step 6: Final answer
    x = 831.69

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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.