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Finding the Fourth Proportional to 607.20, 910.20 and 318.36

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Solution

The fourth proportional to 607.20, 910.20 and 318.36 is: 477.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.20 : 910.20 = 318.36 : x
  2. Step 2: Convert to fraction form
    607.20/910.20 = 318.36/x
  3. Step 3: Cross multiply
    607.20x = 910.20 × 318.36
  4. Step 4: Simplify right side
    607.20x = 289,771.27
  5. Step 5: Solve for x
    x = 289,771.27/607.20
  6. Step 6: Final answer
    x = 477.23

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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.