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Finding the Fourth Proportional to 802.06, 1,107.36 and 615.21

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Solution

The fourth proportional to 802.06, 1,107.36 and 615.21 is: 849.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.06 : 1,107.36 = 615.21 : x
  2. Step 2: Convert to fraction form
    802.06/1,107.36 = 615.21/x
  3. Step 3: Cross multiply
    802.06x = 1,107.36 × 615.21
  4. Step 4: Simplify right side
    802.06x = 681,258.95
  5. Step 5: Solve for x
    x = 681,258.95/802.06
  6. Step 6: Final answer
    x = 849.39

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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.