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Finding the Fourth Proportional to 691.93, 954.74 and 397.19

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Solution

The fourth proportional to 691.93, 954.74 and 397.19 is: 548.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.93 : 954.74 = 397.19 : x
  2. Step 2: Convert to fraction form
    691.93/954.74 = 397.19/x
  3. Step 3: Cross multiply
    691.93x = 954.74 × 397.19
  4. Step 4: Simplify right side
    691.93x = 379,212.98
  5. Step 5: Solve for x
    x = 379,212.98/691.93
  6. Step 6: Final answer
    x = 548.05

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Double scale
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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.