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Finding the Fourth Proportional to 686.97, 1,030.45 and 302.22

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Solution

The fourth proportional to 686.97, 1,030.45 and 302.22 is: 453.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    686.97 : 1,030.45 = 302.22 : x
  2. Step 2: Convert to fraction form
    686.97/1,030.45 = 302.22/x
  3. Step 3: Cross multiply
    686.97x = 1,030.45 × 302.22
  4. Step 4: Simplify right side
    686.97x = 311,422.60
  5. Step 5: Solve for x
    x = 311,422.60/686.97
  6. Step 6: Final answer
    x = 453.33

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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.