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Finding the Fourth Proportional to 500.50, 750.76 and 385.12

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Solution

The fourth proportional to 500.50, 750.76 and 385.12 is: 577.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.50 : 750.76 = 385.12 : x
  2. Step 2: Convert to fraction form
    500.50/750.76 = 385.12/x
  3. Step 3: Cross multiply
    500.50x = 750.76 × 385.12
  4. Step 4: Simplify right side
    500.50x = 289,132.69
  5. Step 5: Solve for x
    x = 289,132.69/500.50
  6. Step 6: Final answer
    x = 577.69

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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.