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Finding the Fourth Proportional to 802.56, 1,105.68 and 615.84

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Solution

The fourth proportional to 802.56, 1,105.68 and 615.84 is: 848.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.56 : 1,105.68 = 615.84 : x
  2. Step 2: Convert to fraction form
    802.56/1,105.68 = 615.84/x
  3. Step 3: Cross multiply
    802.56x = 1,105.68 × 615.84
  4. Step 4: Simplify right side
    802.56x = 680,921.97
  5. Step 5: Solve for x
    x = 680,921.97/802.56
  6. Step 6: Final answer
    x = 848.44

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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.