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Finding the Fourth Proportional to 515.05, 710.76 and 294

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Solution

The fourth proportional to 515.05, 710.76 and 294 is: 405.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.05 : 710.76 = 294 : x
  2. Step 2: Convert to fraction form
    515.05/710.76 = 294/x
  3. Step 3: Cross multiply
    515.05x = 710.76 × 294
  4. Step 4: Simplify right side
    515.05x = 208,963.44
  5. Step 5: Solve for x
    x = 208,963.44/515.05
  6. Step 6: Final answer
    x = 405.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.