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Finding the Fourth Proportional to 802.51, 1,108.38 and 615.60

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Solution

The fourth proportional to 802.51, 1,108.38 and 615.60 is: 850.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.51 : 1,108.38 = 615.60 : x
  2. Step 2: Convert to fraction form
    802.51/1,108.38 = 615.60/x
  3. Step 3: Cross multiply
    802.51x = 1,108.38 × 615.60
  4. Step 4: Simplify right side
    802.51x = 682,321.04
  5. Step 5: Solve for x
    x = 682,321.04/802.51
  6. Step 6: Final answer
    x = 850.24

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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.