Home / 1,418.68-2,129.06-931.56

Finding the Fourth Proportional to 1,418.68, 2,129.06 and 931.56

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Solution

The fourth proportional to 1,418.68, 2,129.06 and 931.56 is: 1,398.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.68 : 2,129.06 = 931.56 : x
  2. Step 2: Convert to fraction form
    1,418.68/2,129.06 = 931.56/x
  3. Step 3: Cross multiply
    1,418.68x = 2,129.06 × 931.56
  4. Step 4: Simplify right side
    1,418.68x = 1,983,347.13
  5. Step 5: Solve for x
    x = 1,983,347.13/1,418.68
  6. Step 6: Final answer
    x = 1,398.02

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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.