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Finding the Fourth Proportional to 802.68, 1,107.72 and 492.18

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Solution

The fourth proportional to 802.68, 1,107.72 and 492.18 is: 679.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.68 : 1,107.72 = 492.18 : x
  2. Step 2: Convert to fraction form
    802.68/1,107.72 = 492.18/x
  3. Step 3: Cross multiply
    802.68x = 1,107.72 × 492.18
  4. Step 4: Simplify right side
    802.68x = 545,197.63
  5. Step 5: Solve for x
    x = 545,197.63/802.68
  6. Step 6: Final answer
    x = 679.22

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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.