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Finding the Fourth Proportional to 366.13, 505.70 and 317.61

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Solution

The fourth proportional to 366.13, 505.70 and 317.61 is: 438.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    366.13 : 505.70 = 317.61 : x
  2. Step 2: Convert to fraction form
    366.13/505.70 = 317.61/x
  3. Step 3: Cross multiply
    366.13x = 505.70 × 317.61
  4. Step 4: Simplify right side
    366.13x = 160,616.17
  5. Step 5: Solve for x
    x = 160,616.17/366.13
  6. Step 6: Final answer
    x = 438.69

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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.