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Finding the Fourth Proportional to 474.86, 712.89 and 403.18

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Solution

The fourth proportional to 474.86, 712.89 and 403.18 is: 605.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.86 : 712.89 = 403.18 : x
  2. Step 2: Convert to fraction form
    474.86/712.89 = 403.18/x
  3. Step 3: Cross multiply
    474.86x = 712.89 × 403.18
  4. Step 4: Simplify right side
    474.86x = 287,422.99
  5. Step 5: Solve for x
    x = 287,422.99/474.86
  6. Step 6: Final answer
    x = 605.28

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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.