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Finding the Fourth Proportional to 616.78, 851.30 and 368.25

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Solution

The fourth proportional to 616.78, 851.30 and 368.25 is: 508.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.78 : 851.30 = 368.25 : x
  2. Step 2: Convert to fraction form
    616.78/851.30 = 368.25/x
  3. Step 3: Cross multiply
    616.78x = 851.30 × 368.25
  4. Step 4: Simplify right side
    616.78x = 313,491.23
  5. Step 5: Solve for x
    x = 313,491.23/616.78
  6. Step 6: Final answer
    x = 508.27

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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.