Home / 1,631.80-2,251.78-933.16

Finding the Fourth Proportional to 1,631.80, 2,251.78 and 933.16

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Solution

The fourth proportional to 1,631.80, 2,251.78 and 933.16 is: 1,287.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.80 : 2,251.78 = 933.16 : x
  2. Step 2: Convert to fraction form
    1,631.80/2,251.78 = 933.16/x
  3. Step 3: Cross multiply
    1,631.80x = 2,251.78 × 933.16
  4. Step 4: Simplify right side
    1,631.80x = 2,101,271.02
  5. Step 5: Solve for x
    x = 2,101,271.02/1,631.80
  6. Step 6: Final answer
    x = 1,287.70

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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.