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Finding the Fourth Proportional to 556.68, 833.76 and 339.78

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Solution

The fourth proportional to 556.68, 833.76 and 339.78 is: 508.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.68 : 833.76 = 339.78 : x
  2. Step 2: Convert to fraction form
    556.68/833.76 = 339.78/x
  3. Step 3: Cross multiply
    556.68x = 833.76 × 339.78
  4. Step 4: Simplify right side
    556.68x = 283,294.97
  5. Step 5: Solve for x
    x = 283,294.97/556.68
  6. Step 6: Final answer
    x = 508.90

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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.