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Finding the Fourth Proportional to 691.19, 953.83 and 376.45

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Solution

The fourth proportional to 691.19, 953.83 and 376.45 is: 519.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.19 : 953.83 = 376.45 : x
  2. Step 2: Convert to fraction form
    691.19/953.83 = 376.45/x
  3. Step 3: Cross multiply
    691.19x = 953.83 × 376.45
  4. Step 4: Simplify right side
    691.19x = 359,069.30
  5. Step 5: Solve for x
    x = 359,069.30/691.19
  6. Step 6: Final answer
    x = 519.49

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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.