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Finding the Fourth Proportional to 500.34, 750.78 and 378.57

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Solution

The fourth proportional to 500.34, 750.78 and 378.57 is: 568.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.34 : 750.78 = 378.57 : x
  2. Step 2: Convert to fraction form
    500.34/750.78 = 378.57/x
  3. Step 3: Cross multiply
    500.34x = 750.78 × 378.57
  4. Step 4: Simplify right side
    500.34x = 284,222.78
  5. Step 5: Solve for x
    x = 284,222.78/500.34
  6. Step 6: Final answer
    x = 568.06

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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.