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Finding the Fourth Proportional to 1,288.66, 1,775.76 and 933.97

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Solution

The fourth proportional to 1,288.66, 1,775.76 and 933.97 is: 1,287.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.66 : 1,775.76 = 933.97 : x
  2. Step 2: Convert to fraction form
    1,288.66/1,775.76 = 933.97/x
  3. Step 3: Cross multiply
    1,288.66x = 1,775.76 × 933.97
  4. Step 4: Simplify right side
    1,288.66x = 1,658,506.57
  5. Step 5: Solve for x
    x = 1,658,506.57/1,288.66
  6. Step 6: Final answer
    x = 1,287.00

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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.