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Finding the Fourth Proportional to 474.57, 655.63 and 405.34

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Solution

The fourth proportional to 474.57, 655.63 and 405.34 is: 559.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.57 : 655.63 = 405.34 : x
  2. Step 2: Convert to fraction form
    474.57/655.63 = 405.34/x
  3. Step 3: Cross multiply
    474.57x = 655.63 × 405.34
  4. Step 4: Simplify right side
    474.57x = 265,750.41
  5. Step 5: Solve for x
    x = 265,750.41/474.57
  6. Step 6: Final answer
    x = 559.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.