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Finding the Fourth Proportional to 635.04, 874.80 and 438.21

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Solution

The fourth proportional to 635.04, 874.80 and 438.21 is: 603.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.04 : 874.80 = 438.21 : x
  2. Step 2: Convert to fraction form
    635.04/874.80 = 438.21/x
  3. Step 3: Cross multiply
    635.04x = 874.80 × 438.21
  4. Step 4: Simplify right side
    635.04x = 383,346.11
  5. Step 5: Solve for x
    x = 383,346.11/635.04
  6. Step 6: Final answer
    x = 603.66

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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.