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Finding the Fourth Proportional to 474.30, 653.91 and 349.74

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Solution

The fourth proportional to 474.30, 653.91 and 349.74 is: 482.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.30 : 653.91 = 349.74 : x
  2. Step 2: Convert to fraction form
    474.30/653.91 = 349.74/x
  3. Step 3: Cross multiply
    474.30x = 653.91 × 349.74
  4. Step 4: Simplify right side
    474.30x = 228,698.48
  5. Step 5: Solve for x
    x = 228,698.48/474.30
  6. Step 6: Final answer
    x = 482.18

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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.