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Finding the Fourth Proportional to 691.77, 1,036.14 and 536.48

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Solution

The fourth proportional to 691.77, 1,036.14 and 536.48 is: 803.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.77 : 1,036.14 = 536.48 : x
  2. Step 2: Convert to fraction form
    691.77/1,036.14 = 536.48/x
  3. Step 3: Cross multiply
    691.77x = 1,036.14 × 536.48
  4. Step 4: Simplify right side
    691.77x = 555,870.98
  5. Step 5: Solve for x
    x = 555,870.98/691.77
  6. Step 6: Final answer
    x = 803.55

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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.