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Finding the Fourth Proportional to 607.25, 909.17 and 387.34

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Solution

The fourth proportional to 607.25, 909.17 and 387.34 is: 579.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.25 : 909.17 = 387.34 : x
  2. Step 2: Convert to fraction form
    607.25/909.17 = 387.34/x
  3. Step 3: Cross multiply
    607.25x = 909.17 × 387.34
  4. Step 4: Simplify right side
    607.25x = 352,157.91
  5. Step 5: Solve for x
    x = 352,157.91/607.25
  6. Step 6: Final answer
    x = 579.92

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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.