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Finding the Fourth Proportional to 712.51, 1,067.85 and 322.50

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Solution

The fourth proportional to 712.51, 1,067.85 and 322.50 is: 483.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.51 : 1,067.85 = 322.50 : x
  2. Step 2: Convert to fraction form
    712.51/1,067.85 = 322.50/x
  3. Step 3: Cross multiply
    712.51x = 1,067.85 × 322.50
  4. Step 4: Simplify right side
    712.51x = 344,381.63
  5. Step 5: Solve for x
    x = 344,381.63/712.51
  6. Step 6: Final answer
    x = 483.34

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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.