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Finding the Fourth Proportional to 477.05, 714.78 and 339.41

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Solution

The fourth proportional to 477.05, 714.78 and 339.41 is: 508.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.05 : 714.78 = 339.41 : x
  2. Step 2: Convert to fraction form
    477.05/714.78 = 339.41/x
  3. Step 3: Cross multiply
    477.05x = 714.78 × 339.41
  4. Step 4: Simplify right side
    477.05x = 242,605.27
  5. Step 5: Solve for x
    x = 242,605.27/477.05
  6. Step 6: Final answer
    x = 508.56

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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.