Home / 1,587.10-2,191.22-1,421.02

Finding the Fourth Proportional to 1,587.10, 2,191.22 and 1,421.02

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Solution

The fourth proportional to 1,587.10, 2,191.22 and 1,421.02 is: 1,961.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.10 : 2,191.22 = 1,421.02 : x
  2. Step 2: Convert to fraction form
    1,587.10/2,191.22 = 1,421.02/x
  3. Step 3: Cross multiply
    1,587.10x = 2,191.22 × 1,421.02
  4. Step 4: Simplify right side
    1,587.10x = 3,113,767.44
  5. Step 5: Solve for x
    x = 3,113,767.44/1,587.10
  6. Step 6: Final answer
    x = 1,961.92

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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.