Home / 1,325.39-1,987.32-887.15

Finding the Fourth Proportional to 1,325.39, 1,987.32 and 887.15

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Solution

The fourth proportional to 1,325.39, 1,987.32 and 887.15 is: 1,330.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.39 : 1,987.32 = 887.15 : x
  2. Step 2: Convert to fraction form
    1,325.39/1,987.32 = 887.15/x
  3. Step 3: Cross multiply
    1,325.39x = 1,987.32 × 887.15
  4. Step 4: Simplify right side
    1,325.39x = 1,763,050.94
  5. Step 5: Solve for x
    x = 1,763,050.94/1,325.39
  6. Step 6: Final answer
    x = 1,330.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.