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Finding the Fourth Proportional to 985.95, 1,360.38 and 566.25

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Solution

The fourth proportional to 985.95, 1,360.38 and 566.25 is: 781.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.95 : 1,360.38 = 566.25 : x
  2. Step 2: Convert to fraction form
    985.95/1,360.38 = 566.25/x
  3. Step 3: Cross multiply
    985.95x = 1,360.38 × 566.25
  4. Step 4: Simplify right side
    985.95x = 770,315.18
  5. Step 5: Solve for x
    x = 770,315.18/985.95
  6. Step 6: Final answer
    x = 781.29

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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.