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Finding the Fourth Proportional to 575.82, 862.38 and 421.35

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Solution

The fourth proportional to 575.82, 862.38 and 421.35 is: 631.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.82 : 862.38 = 421.35 : x
  2. Step 2: Convert to fraction form
    575.82/862.38 = 421.35/x
  3. Step 3: Cross multiply
    575.82x = 862.38 × 421.35
  4. Step 4: Simplify right side
    575.82x = 363,363.81
  5. Step 5: Solve for x
    x = 363,363.81/575.82
  6. Step 6: Final answer
    x = 631.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.