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Finding the Fourth Proportional to 508.90, 762.22 and 392.50

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Solution

The fourth proportional to 508.90, 762.22 and 392.50 is: 587.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.90 : 762.22 = 392.50 : x
  2. Step 2: Convert to fraction form
    508.90/762.22 = 392.50/x
  3. Step 3: Cross multiply
    508.90x = 762.22 × 392.50
  4. Step 4: Simplify right side
    508.90x = 299,171.35
  5. Step 5: Solve for x
    x = 299,171.35/508.90
  6. Step 6: Final answer
    x = 587.88

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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.