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Finding the Fourth Proportional to 575.13, 793.72 and 492.21

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Solution

The fourth proportional to 575.13, 793.72 and 492.21 is: 679.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.13 : 793.72 = 492.21 : x
  2. Step 2: Convert to fraction form
    575.13/793.72 = 492.21/x
  3. Step 3: Cross multiply
    575.13x = 793.72 × 492.21
  4. Step 4: Simplify right side
    575.13x = 390,670.49
  5. Step 5: Solve for x
    x = 390,670.49/575.13
  6. Step 6: Final answer
    x = 679.27

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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.