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Finding the Fourth Proportional to 691.64, 1,036.85 and 362.22

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Solution

The fourth proportional to 691.64, 1,036.85 and 362.22 is: 543.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.64 : 1,036.85 = 362.22 : x
  2. Step 2: Convert to fraction form
    691.64/1,036.85 = 362.22/x
  3. Step 3: Cross multiply
    691.64x = 1,036.85 × 362.22
  4. Step 4: Simplify right side
    691.64x = 375,569.98
  5. Step 5: Solve for x
    x = 375,569.98/691.64
  6. Step 6: Final answer
    x = 543.01

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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.