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Finding the Fourth Proportional to 1,866.30, 2,797.48 and 769.15

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Solution

The fourth proportional to 1,866.30, 2,797.48 and 769.15 is: 1,152.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,866.30 : 2,797.48 = 769.15 : x
  2. Step 2: Convert to fraction form
    1,866.30/2,797.48 = 769.15/x
  3. Step 3: Cross multiply
    1,866.30x = 2,797.48 × 769.15
  4. Step 4: Simplify right side
    1,866.30x = 2,151,681.74
  5. Step 5: Solve for x
    x = 2,151,681.74/1,866.30
  6. Step 6: Final answer
    x = 1,152.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.