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Finding the Fourth Proportional to 663.52, 915.61 and 368.83

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Solution

The fourth proportional to 663.52, 915.61 and 368.83 is: 508.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.52 : 915.61 = 368.83 : x
  2. Step 2: Convert to fraction form
    663.52/915.61 = 368.83/x
  3. Step 3: Cross multiply
    663.52x = 915.61 × 368.83
  4. Step 4: Simplify right side
    663.52x = 337,698.01
  5. Step 5: Solve for x
    x = 337,698.01/663.52
  6. Step 6: Final answer
    x = 508.95

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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.