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Finding the Fourth Proportional to 633.48, 946.49 and 621.91

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Solution

The fourth proportional to 633.48, 946.49 and 621.91 is: 929.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.48 : 946.49 = 621.91 : x
  2. Step 2: Convert to fraction form
    633.48/946.49 = 621.91/x
  3. Step 3: Cross multiply
    633.48x = 946.49 × 621.91
  4. Step 4: Simplify right side
    633.48x = 588,631.60
  5. Step 5: Solve for x
    x = 588,631.60/633.48
  6. Step 6: Final answer
    x = 929.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.