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Finding the Fourth Proportional to 691.65, 1,037.57 and 367.04

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Solution

The fourth proportional to 691.65, 1,037.57 and 367.04 is: 550.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.65 : 1,037.57 = 367.04 : x
  2. Step 2: Convert to fraction form
    691.65/1,037.57 = 367.04/x
  3. Step 3: Cross multiply
    691.65x = 1,037.57 × 367.04
  4. Step 4: Simplify right side
    691.65x = 380,822.67
  5. Step 5: Solve for x
    x = 380,822.67/691.65
  6. Step 6: Final answer
    x = 550.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.