Home / 1,331.77-1,838.28-1,191.64

Finding the Fourth Proportional to 1,331.77, 1,838.28 and 1,191.64

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Solution

The fourth proportional to 1,331.77, 1,838.28 and 1,191.64 is: 1,644.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.77 : 1,838.28 = 1,191.64 : x
  2. Step 2: Convert to fraction form
    1,331.77/1,838.28 = 1,191.64/x
  3. Step 3: Cross multiply
    1,331.77x = 1,838.28 × 1,191.64
  4. Step 4: Simplify right side
    1,331.77x = 2,190,567.98
  5. Step 5: Solve for x
    x = 2,190,567.98/1,331.77
  6. Step 6: Final answer
    x = 1,644.85

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1.5x scale

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.