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Finding the Fourth Proportional to 926.77, 1,276.89 and 729.94

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Solution

The fourth proportional to 926.77, 1,276.89 and 729.94 is: 1,005.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.77 : 1,276.89 = 729.94 : x
  2. Step 2: Convert to fraction form
    926.77/1,276.89 = 729.94/x
  3. Step 3: Cross multiply
    926.77x = 1,276.89 × 729.94
  4. Step 4: Simplify right side
    926.77x = 932,053.09
  5. Step 5: Solve for x
    x = 932,053.09/926.77
  6. Step 6: Final answer
    x = 1,005.70

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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.