Home / 1,401.28-2,102.79-579.40

Finding the Fourth Proportional to 1,401.28, 2,102.79 and 579.40

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Solution

The fourth proportional to 1,401.28, 2,102.79 and 579.40 is: 869.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.28 : 2,102.79 = 579.40 : x
  2. Step 2: Convert to fraction form
    1,401.28/2,102.79 = 579.40/x
  3. Step 3: Cross multiply
    1,401.28x = 2,102.79 × 579.40
  4. Step 4: Simplify right side
    1,401.28x = 1,218,356.53
  5. Step 5: Solve for x
    x = 1,218,356.53/1,401.28
  6. Step 6: Final answer
    x = 869.46

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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.