Home / 1,325.17-1,987.85-400.66

Finding the Fourth Proportional to 1,325.17, 1,987.85 and 400.66

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Solution

The fourth proportional to 1,325.17, 1,987.85 and 400.66 is: 601.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.17 : 1,987.85 = 400.66 : x
  2. Step 2: Convert to fraction form
    1,325.17/1,987.85 = 400.66/x
  3. Step 3: Cross multiply
    1,325.17x = 1,987.85 × 400.66
  4. Step 4: Simplify right side
    1,325.17x = 796,451.98
  5. Step 5: Solve for x
    x = 796,451.98/1,325.17
  6. Step 6: Final answer
    x = 601.02

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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.