Home / 1,587.32-2,191.56-1,421.24

Finding the Fourth Proportional to 1,587.32, 2,191.56 and 1,421.24

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Solution

The fourth proportional to 1,587.32, 2,191.56 and 1,421.24 is: 1,962.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.32 : 2,191.56 = 1,421.24 : x
  2. Step 2: Convert to fraction form
    1,587.32/2,191.56 = 1,421.24/x
  3. Step 3: Cross multiply
    1,587.32x = 2,191.56 × 1,421.24
  4. Step 4: Simplify right side
    1,587.32x = 3,114,732.73
  5. Step 5: Solve for x
    x = 3,114,732.73/1,587.32
  6. Step 6: Final answer
    x = 1,962.26

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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.