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Finding the Fourth Proportional to 530.43, 793.95 and 426.56

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Solution

The fourth proportional to 530.43, 793.95 and 426.56 is: 638.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.43 : 793.95 = 426.56 : x
  2. Step 2: Convert to fraction form
    530.43/793.95 = 426.56/x
  3. Step 3: Cross multiply
    530.43x = 793.95 × 426.56
  4. Step 4: Simplify right side
    530.43x = 338,663.34
  5. Step 5: Solve for x
    x = 338,663.34/530.43
  6. Step 6: Final answer
    x = 638.47

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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.