Home / 1,392.19-2,088.28-418.37

Finding the Fourth Proportional to 1,392.19, 2,088.28 and 418.37

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Solution

The fourth proportional to 1,392.19, 2,088.28 and 418.37 is: 627.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.19 : 2,088.28 = 418.37 : x
  2. Step 2: Convert to fraction form
    1,392.19/2,088.28 = 418.37/x
  3. Step 3: Cross multiply
    1,392.19x = 2,088.28 × 418.37
  4. Step 4: Simplify right side
    1,392.19x = 873,663.79
  5. Step 5: Solve for x
    x = 873,663.79/1,392.19
  6. Step 6: Final answer
    x = 627.55

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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.