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Finding the Fourth Proportional to 712.61, 1,069.19 and 322.60

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Solution

The fourth proportional to 712.61, 1,069.19 and 322.60 is: 484.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.61 : 1,069.19 = 322.60 : x
  2. Step 2: Convert to fraction form
    712.61/1,069.19 = 322.60/x
  3. Step 3: Cross multiply
    712.61x = 1,069.19 × 322.60
  4. Step 4: Simplify right side
    712.61x = 344,920.69
  5. Step 5: Solve for x
    x = 344,920.69/712.61
  6. Step 6: Final answer
    x = 484.02

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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.