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Finding the Fourth Proportional to 712.81, 1,070.07 and 302.23

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Solution

The fourth proportional to 712.81, 1,070.07 and 302.23 is: 453.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.81 : 1,070.07 = 302.23 : x
  2. Step 2: Convert to fraction form
    712.81/1,070.07 = 302.23/x
  3. Step 3: Cross multiply
    712.81x = 1,070.07 × 302.23
  4. Step 4: Simplify right side
    712.81x = 323,407.26
  5. Step 5: Solve for x
    x = 323,407.26/712.81
  6. Step 6: Final answer
    x = 453.71

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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.