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Finding the Fourth Proportional to 986.02, 1,360.67 and 566.40

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Solution

The fourth proportional to 986.02, 1,360.67 and 566.40 is: 781.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.02 : 1,360.67 = 566.40 : x
  2. Step 2: Convert to fraction form
    986.02/1,360.67 = 566.40/x
  3. Step 3: Cross multiply
    986.02x = 1,360.67 × 566.40
  4. Step 4: Simplify right side
    986.02x = 770,683.49
  5. Step 5: Solve for x
    x = 770,683.49/986.02
  6. Step 6: Final answer
    x = 781.61

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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.