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Finding the Fourth Proportional to 802.40, 1,107.06 and 615.56

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Solution

The fourth proportional to 802.40, 1,107.06 and 615.56 is: 849.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.40 : 1,107.06 = 615.56 : x
  2. Step 2: Convert to fraction form
    802.40/1,107.06 = 615.56/x
  3. Step 3: Cross multiply
    802.40x = 1,107.06 × 615.56
  4. Step 4: Simplify right side
    802.40x = 681,461.85
  5. Step 5: Solve for x
    x = 681,461.85/802.40
  6. Step 6: Final answer
    x = 849.28

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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.