Home / 1,290.11-1,935.14-424.43

Finding the Fourth Proportional to 1,290.11, 1,935.14 and 424.43

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Solution

The fourth proportional to 1,290.11, 1,935.14 and 424.43 is: 636.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.11 : 1,935.14 = 424.43 : x
  2. Step 2: Convert to fraction form
    1,290.11/1,935.14 = 424.43/x
  3. Step 3: Cross multiply
    1,290.11x = 1,935.14 × 424.43
  4. Step 4: Simplify right side
    1,290.11x = 821,319.67
  5. Step 5: Solve for x
    x = 821,319.67/1,290.11
  6. Step 6: Final answer
    x = 636.63

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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.