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Finding the Fourth Proportional to 713.12, 1,069.79 and 302.31

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Solution

The fourth proportional to 713.12, 1,069.79 and 302.31 is: 453.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.12 : 1,069.79 = 302.31 : x
  2. Step 2: Convert to fraction form
    713.12/1,069.79 = 302.31/x
  3. Step 3: Cross multiply
    713.12x = 1,069.79 × 302.31
  4. Step 4: Simplify right side
    713.12x = 323,406.70
  5. Step 5: Solve for x
    x = 323,406.70/713.12
  6. Step 6: Final answer
    x = 453.51

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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.