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Finding the Fourth Proportional to 691.72, 954.55 and 376.98

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Solution

The fourth proportional to 691.72, 954.55 and 376.98 is: 520.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.72 : 954.55 = 376.98 : x
  2. Step 2: Convert to fraction form
    691.72/954.55 = 376.98/x
  3. Step 3: Cross multiply
    691.72x = 954.55 × 376.98
  4. Step 4: Simplify right side
    691.72x = 359,846.26
  5. Step 5: Solve for x
    x = 359,846.26/691.72
  6. Step 6: Final answer
    x = 520.22

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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.