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Finding the Fourth Proportional to 985.85, 1,360.28 and 566.19

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Solution

The fourth proportional to 985.85, 1,360.28 and 566.19 is: 781.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.85 : 1,360.28 = 566.19 : x
  2. Step 2: Convert to fraction form
    985.85/1,360.28 = 566.19/x
  3. Step 3: Cross multiply
    985.85x = 1,360.28 × 566.19
  4. Step 4: Simplify right side
    985.85x = 770,174.10
  5. Step 5: Solve for x
    x = 770,174.10/985.85
  6. Step 6: Final answer
    x = 781.23

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Double scale
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1.5x scale

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.