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Finding the Fourth Proportional to 1,069.79, 1,476.23 and 591.14

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Solution

The fourth proportional to 1,069.79, 1,476.23 and 591.14 is: 815.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.79 : 1,476.23 = 591.14 : x
  2. Step 2: Convert to fraction form
    1,069.79/1,476.23 = 591.14/x
  3. Step 3: Cross multiply
    1,069.79x = 1,476.23 × 591.14
  4. Step 4: Simplify right side
    1,069.79x = 872,659.34
  5. Step 5: Solve for x
    x = 872,659.34/1,069.79
  6. Step 6: Final answer
    x = 815.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.