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Finding the Fourth Proportional to 663.09, 915.10 and 368.39

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Solution

The fourth proportional to 663.09, 915.10 and 368.39 is: 508.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.09 : 915.10 = 368.39 : x
  2. Step 2: Convert to fraction form
    663.09/915.10 = 368.39/x
  3. Step 3: Cross multiply
    663.09x = 915.10 × 368.39
  4. Step 4: Simplify right side
    663.09x = 337,108.19
  5. Step 5: Solve for x
    x = 337,108.19/663.09
  6. Step 6: Final answer
    x = 508.39

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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.