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Finding the Fourth Proportional to 932.05, 1,398.21 and 412.03

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Solution

The fourth proportional to 932.05, 1,398.21 and 412.03 is: 618.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.05 : 1,398.21 = 412.03 : x
  2. Step 2: Convert to fraction form
    932.05/1,398.21 = 412.03/x
  3. Step 3: Cross multiply
    932.05x = 1,398.21 × 412.03
  4. Step 4: Simplify right side
    932.05x = 576,104.47
  5. Step 5: Solve for x
    x = 576,104.47/932.05
  6. Step 6: Final answer
    x = 618.10

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1.5x scale

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.