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Finding the Fourth Proportional to 526.11, 789.62 and 405.12

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Solution

The fourth proportional to 526.11, 789.62 and 405.12 is: 608.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.11 : 789.62 = 405.12 : x
  2. Step 2: Convert to fraction form
    526.11/789.62 = 405.12/x
  3. Step 3: Cross multiply
    526.11x = 789.62 × 405.12
  4. Step 4: Simplify right side
    526.11x = 319,888.83
  5. Step 5: Solve for x
    x = 319,888.83/526.11
  6. Step 6: Final answer
    x = 608.03

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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.