Home / 1,325.12-1,987.54-351.32

Finding the Fourth Proportional to 1,325.12, 1,987.54 and 351.32

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Solution

The fourth proportional to 1,325.12, 1,987.54 and 351.32 is: 526.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.12 : 1,987.54 = 351.32 : x
  2. Step 2: Convert to fraction form
    1,325.12/1,987.54 = 351.32/x
  3. Step 3: Cross multiply
    1,325.12x = 1,987.54 × 351.32
  4. Step 4: Simplify right side
    1,325.12x = 698,251.74
  5. Step 5: Solve for x
    x = 698,251.74/1,325.12
  6. Step 6: Final answer
    x = 526.94

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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.