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Finding the Fourth Proportional to 981.01, 1,471.15 and 403.93

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Solution

The fourth proportional to 981.01, 1,471.15 and 403.93 is: 605.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.01 : 1,471.15 = 403.93 : x
  2. Step 2: Convert to fraction form
    981.01/1,471.15 = 403.93/x
  3. Step 3: Cross multiply
    981.01x = 1,471.15 × 403.93
  4. Step 4: Simplify right side
    981.01x = 594,241.62
  5. Step 5: Solve for x
    x = 594,241.62/981.01
  6. Step 6: Final answer
    x = 605.74

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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.