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Finding the Fourth Proportional to 926.91, 1,278.92 and 577.67

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Solution

The fourth proportional to 926.91, 1,278.92 and 577.67 is: 797.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.91 : 1,278.92 = 577.67 : x
  2. Step 2: Convert to fraction form
    926.91/1,278.92 = 577.67/x
  3. Step 3: Cross multiply
    926.91x = 1,278.92 × 577.67
  4. Step 4: Simplify right side
    926.91x = 738,788.77
  5. Step 5: Solve for x
    x = 738,788.77/926.91
  6. Step 6: Final answer
    x = 797.04

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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.