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Finding the Fourth Proportional to 922.87, 1,272.90 and 591.72

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Solution

The fourth proportional to 922.87, 1,272.90 and 591.72 is: 816.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.87 : 1,272.90 = 591.72 : x
  2. Step 2: Convert to fraction form
    922.87/1,272.90 = 591.72/x
  3. Step 3: Cross multiply
    922.87x = 1,272.90 × 591.72
  4. Step 4: Simplify right side
    922.87x = 753,200.39
  5. Step 5: Solve for x
    x = 753,200.39/922.87
  6. Step 6: Final answer
    x = 816.15

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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.