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Finding the Fourth Proportional to 423.95, 587.19 and 392.36

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Solution

The fourth proportional to 423.95, 587.19 and 392.36 is: 543.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.95 : 587.19 = 392.36 : x
  2. Step 2: Convert to fraction form
    423.95/587.19 = 392.36/x
  3. Step 3: Cross multiply
    423.95x = 587.19 × 392.36
  4. Step 4: Simplify right side
    423.95x = 230,388.40
  5. Step 5: Solve for x
    x = 230,388.40/423.95
  6. Step 6: Final answer
    x = 543.44

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.