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Finding the Fourth Proportional to 315.74, 473.30 and 153.33

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Solution

The fourth proportional to 315.74, 473.30 and 153.33 is: 229.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.74 : 473.30 = 153.33 : x
  2. Step 2: Convert to fraction form
    315.74/473.30 = 153.33/x
  3. Step 3: Cross multiply
    315.74x = 473.30 × 153.33
  4. Step 4: Simplify right side
    315.74x = 72,573.25
  5. Step 5: Solve for x
    x = 72,573.25/315.74
  6. Step 6: Final answer
    x = 229.85

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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.