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Finding the Fourth Proportional to 1,069.08, 1,602.14 and 808.87

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Solution

The fourth proportional to 1,069.08, 1,602.14 and 808.87 is: 1,212.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.08 : 1,602.14 = 808.87 : x
  2. Step 2: Convert to fraction form
    1,069.08/1,602.14 = 808.87/x
  3. Step 3: Cross multiply
    1,069.08x = 1,602.14 × 808.87
  4. Step 4: Simplify right side
    1,069.08x = 1,295,922.98
  5. Step 5: Solve for x
    x = 1,295,922.98/1,069.08
  6. Step 6: Final answer
    x = 1,212.19

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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.