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Finding the Fourth Proportional to 922.60, 1,272.90 and 568.68

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Solution

The fourth proportional to 922.60, 1,272.90 and 568.68 is: 784.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.60 : 1,272.90 = 568.68 : x
  2. Step 2: Convert to fraction form
    922.60/1,272.90 = 568.68/x
  3. Step 3: Cross multiply
    922.60x = 1,272.90 × 568.68
  4. Step 4: Simplify right side
    922.60x = 723,872.77
  5. Step 5: Solve for x
    x = 723,872.77/922.60
  6. Step 6: Final answer
    x = 784.60

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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.