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Finding the Fourth Proportional to 926.17, 1,277.33 and 786.65

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Solution

The fourth proportional to 926.17, 1,277.33 and 786.65 is: 1,084.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.17 : 1,277.33 = 786.65 : x
  2. Step 2: Convert to fraction form
    926.17/1,277.33 = 786.65/x
  3. Step 3: Cross multiply
    926.17x = 1,277.33 × 786.65
  4. Step 4: Simplify right side
    926.17x = 1,004,801.32
  5. Step 5: Solve for x
    x = 1,004,801.32/926.17
  6. Step 6: Final answer
    x = 1,084.90

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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.