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Finding the Fourth Proportional to 802.28, 1,107.28 and 637.74

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Solution

The fourth proportional to 802.28, 1,107.28 and 637.74 is: 880.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.28 : 1,107.28 = 637.74 : x
  2. Step 2: Convert to fraction form
    802.28/1,107.28 = 637.74/x
  3. Step 3: Cross multiply
    802.28x = 1,107.28 × 637.74
  4. Step 4: Simplify right side
    802.28x = 706,156.75
  5. Step 5: Solve for x
    x = 706,156.75/802.28
  6. Step 6: Final answer
    x = 880.19

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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.