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Finding the Fourth Proportional to 563.42, 777.92 and 423.86

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Solution

The fourth proportional to 563.42, 777.92 and 423.86 is: 585.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.42 : 777.92 = 423.86 : x
  2. Step 2: Convert to fraction form
    563.42/777.92 = 423.86/x
  3. Step 3: Cross multiply
    563.42x = 777.92 × 423.86
  4. Step 4: Simplify right side
    563.42x = 329,729.17
  5. Step 5: Solve for x
    x = 329,729.17/563.42
  6. Step 6: Final answer
    x = 585.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.