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Finding the Fourth Proportional to 1,325.08, 1,987.73 and 351.17

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Solution

The fourth proportional to 1,325.08, 1,987.73 and 351.17 is: 526.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.08 : 1,987.73 = 351.17 : x
  2. Step 2: Convert to fraction form
    1,325.08/1,987.73 = 351.17/x
  3. Step 3: Cross multiply
    1,325.08x = 1,987.73 × 351.17
  4. Step 4: Simplify right side
    1,325.08x = 698,031.14
  5. Step 5: Solve for x
    x = 698,031.14/1,325.08
  6. Step 6: Final answer
    x = 526.78

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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.