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Finding the Fourth Proportional to 986.67, 1,361.61 and 567.03

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Solution

The fourth proportional to 986.67, 1,361.61 and 567.03 is: 782.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.67 : 1,361.61 = 567.03 : x
  2. Step 2: Convert to fraction form
    986.67/1,361.61 = 567.03/x
  3. Step 3: Cross multiply
    986.67x = 1,361.61 × 567.03
  4. Step 4: Simplify right side
    986.67x = 772,073.72
  5. Step 5: Solve for x
    x = 772,073.72/986.67
  6. Step 6: Final answer
    x = 782.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.