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Finding the Fourth Proportional to 932.09, 1,398.06 and 405.05

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Solution

The fourth proportional to 932.09, 1,398.06 and 405.05 is: 607.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.09 : 1,398.06 = 405.05 : x
  2. Step 2: Convert to fraction form
    932.09/1,398.06 = 405.05/x
  3. Step 3: Cross multiply
    932.09x = 1,398.06 × 405.05
  4. Step 4: Simplify right side
    932.09x = 566,277.21
  5. Step 5: Solve for x
    x = 566,277.21/932.09
  6. Step 6: Final answer
    x = 607.54

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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.