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Finding the Fourth Proportional to 637.72, 961.31 and 530.20

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Solution

The fourth proportional to 637.72, 961.31 and 530.20 is: 799.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.72 : 961.31 = 530.20 : x
  2. Step 2: Convert to fraction form
    637.72/961.31 = 530.20/x
  3. Step 3: Cross multiply
    637.72x = 961.31 × 530.20
  4. Step 4: Simplify right side
    637.72x = 509,686.56
  5. Step 5: Solve for x
    x = 509,686.56/637.72
  6. Step 6: Final answer
    x = 799.23

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.