Home / 1,587.21-2,189.40-1,168.65

Finding the Fourth Proportional to 1,587.21, 2,189.40 and 1,168.65

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Solution

The fourth proportional to 1,587.21, 2,189.40 and 1,168.65 is: 1,612.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.21 : 2,189.40 = 1,168.65 : x
  2. Step 2: Convert to fraction form
    1,587.21/2,189.40 = 1,168.65/x
  3. Step 3: Cross multiply
    1,587.21x = 2,189.40 × 1,168.65
  4. Step 4: Simplify right side
    1,587.21x = 2,558,642.31
  5. Step 5: Solve for x
    x = 2,558,642.31/1,587.21
  6. Step 6: Final answer
    x = 1,612.04

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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.