Home / 1,587.28-2,191.16-1,167.64

Finding the Fourth Proportional to 1,587.28, 2,191.16 and 1,167.64

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Solution

The fourth proportional to 1,587.28, 2,191.16 and 1,167.64 is: 1,611.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.28 : 2,191.16 = 1,167.64 : x
  2. Step 2: Convert to fraction form
    1,587.28/2,191.16 = 1,167.64/x
  3. Step 3: Cross multiply
    1,587.28x = 2,191.16 × 1,167.64
  4. Step 4: Simplify right side
    1,587.28x = 2,558,486.06
  5. Step 5: Solve for x
    x = 2,558,486.06/1,587.28
  6. Step 6: Final answer
    x = 1,611.87

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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.