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Finding the Fourth Proportional to 526.96, 789.90 and 309.88

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Solution

The fourth proportional to 526.96, 789.90 and 309.88 is: 464.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.96 : 789.90 = 309.88 : x
  2. Step 2: Convert to fraction form
    526.96/789.90 = 309.88/x
  3. Step 3: Cross multiply
    526.96x = 789.90 × 309.88
  4. Step 4: Simplify right side
    526.96x = 244,774.21
  5. Step 5: Solve for x
    x = 244,774.21/526.96
  6. Step 6: Final answer
    x = 464.50

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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.