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Finding the Fourth Proportional to 503.76, 756 and 339.42

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Solution

The fourth proportional to 503.76, 756 and 339.42 is: 509.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.76 : 756 = 339.42 : x
  2. Step 2: Convert to fraction form
    503.76/756 = 339.42/x
  3. Step 3: Cross multiply
    503.76x = 756 × 339.42
  4. Step 4: Simplify right side
    503.76x = 256,601.52
  5. Step 5: Solve for x
    x = 256,601.52/503.76
  6. Step 6: Final answer
    x = 509.37

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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.