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Finding the Fourth Proportional to 320.13, 480.47 and 158.00

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Solution

The fourth proportional to 320.13, 480.47 and 158.00 is: 237.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.13 : 480.47 = 158.00 : x
  2. Step 2: Convert to fraction form
    320.13/480.47 = 158.00/x
  3. Step 3: Cross multiply
    320.13x = 480.47 × 158.00
  4. Step 4: Simplify right side
    320.13x = 75,911.07
  5. Step 5: Solve for x
    x = 75,911.07/320.13
  6. Step 6: Final answer
    x = 237.13

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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.