Home / 1,290.55-1,936.10-424.75

Finding the Fourth Proportional to 1,290.55, 1,936.10 and 424.75

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Solution

The fourth proportional to 1,290.55, 1,936.10 and 424.75 is: 637.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.55 : 1,936.10 = 424.75 : x
  2. Step 2: Convert to fraction form
    1,290.55/1,936.10 = 424.75/x
  3. Step 3: Cross multiply
    1,290.55x = 1,936.10 × 424.75
  4. Step 4: Simplify right side
    1,290.55x = 822,358.48
  5. Step 5: Solve for x
    x = 822,358.48/1,290.55
  6. Step 6: Final answer
    x = 637.22

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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.