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Finding the Fourth Proportional to 579.44, 869.56 and 425.44

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Solution

The fourth proportional to 579.44, 869.56 and 425.44 is: 638.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.44 : 869.56 = 425.44 : x
  2. Step 2: Convert to fraction form
    579.44/869.56 = 425.44/x
  3. Step 3: Cross multiply
    579.44x = 869.56 × 425.44
  4. Step 4: Simplify right side
    579.44x = 369,945.61
  5. Step 5: Solve for x
    x = 369,945.61/579.44
  6. Step 6: Final answer
    x = 638.45

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1.5x scale

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.