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Finding the Fourth Proportional to 631.59, 943.21 and 539.55

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Solution

The fourth proportional to 631.59, 943.21 and 539.55 is: 805.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.59 : 943.21 = 539.55 : x
  2. Step 2: Convert to fraction form
    631.59/943.21 = 539.55/x
  3. Step 3: Cross multiply
    631.59x = 943.21 × 539.55
  4. Step 4: Simplify right side
    631.59x = 508,908.96
  5. Step 5: Solve for x
    x = 508,908.96/631.59
  6. Step 6: Final answer
    x = 805.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.