Home / 1,587.01-2,190.53-1,115.02

Finding the Fourth Proportional to 1,587.01, 2,190.53 and 1,115.02

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Solution

The fourth proportional to 1,587.01, 2,190.53 and 1,115.02 is: 1,539.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.01 : 2,190.53 = 1,115.02 : x
  2. Step 2: Convert to fraction form
    1,587.01/2,190.53 = 1,115.02/x
  3. Step 3: Cross multiply
    1,587.01x = 2,190.53 × 1,115.02
  4. Step 4: Simplify right side
    1,587.01x = 2,442,473.71
  5. Step 5: Solve for x
    x = 2,442,473.71/1,587.01
  6. Step 6: Final answer
    x = 1,539.04

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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.