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Finding the Fourth Proportional to 530.74, 796.11 and 423.21

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Solution

The fourth proportional to 530.74, 796.11 and 423.21 is: 634.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.74 : 796.11 = 423.21 : x
  2. Step 2: Convert to fraction form
    530.74/796.11 = 423.21/x
  3. Step 3: Cross multiply
    530.74x = 796.11 × 423.21
  4. Step 4: Simplify right side
    530.74x = 336,921.71
  5. Step 5: Solve for x
    x = 336,921.71/530.74
  6. Step 6: Final answer
    x = 634.82

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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.