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Finding the Fourth Proportional to 808.69, 1,211.94 and 462.01

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Solution

The fourth proportional to 808.69, 1,211.94 and 462.01 is: 692.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.69 : 1,211.94 = 462.01 : x
  2. Step 2: Convert to fraction form
    808.69/1,211.94 = 462.01/x
  3. Step 3: Cross multiply
    808.69x = 1,211.94 × 462.01
  4. Step 4: Simplify right side
    808.69x = 559,928.40
  5. Step 5: Solve for x
    x = 559,928.40/808.69
  6. Step 6: Final answer
    x = 692.39

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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.