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Finding the Fourth Proportional to 691.05, 953.64 and 376.32

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Solution

The fourth proportional to 691.05, 953.64 and 376.32 is: 519.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.05 : 953.64 = 376.32 : x
  2. Step 2: Convert to fraction form
    691.05/953.64 = 376.32/x
  3. Step 3: Cross multiply
    691.05x = 953.64 × 376.32
  4. Step 4: Simplify right side
    691.05x = 358,873.80
  5. Step 5: Solve for x
    x = 358,873.80/691.05
  6. Step 6: Final answer
    x = 519.32

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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.