Home / 1,325.12-1,988.01-400.63

Finding the Fourth Proportional to 1,325.12, 1,988.01 and 400.63

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Solution

The fourth proportional to 1,325.12, 1,988.01 and 400.63 is: 601.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.12 : 1,988.01 = 400.63 : x
  2. Step 2: Convert to fraction form
    1,325.12/1,988.01 = 400.63/x
  3. Step 3: Cross multiply
    1,325.12x = 1,988.01 × 400.63
  4. Step 4: Simplify right side
    1,325.12x = 796,456.45
  5. Step 5: Solve for x
    x = 796,456.45/1,325.12
  6. Step 6: Final answer
    x = 601.04

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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.