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Finding the Fourth Proportional to 501.78, 752.44 and 325.80

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Solution

The fourth proportional to 501.78, 752.44 and 325.80 is: 488.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.78 : 752.44 = 325.80 : x
  2. Step 2: Convert to fraction form
    501.78/752.44 = 325.80/x
  3. Step 3: Cross multiply
    501.78x = 752.44 × 325.80
  4. Step 4: Simplify right side
    501.78x = 245,144.95
  5. Step 5: Solve for x
    x = 245,144.95/501.78
  6. Step 6: Final answer
    x = 488.55

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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.