Home / 1,353.04-2,029.83-428.57

Finding the Fourth Proportional to 1,353.04, 2,029.83 and 428.57

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Solution

The fourth proportional to 1,353.04, 2,029.83 and 428.57 is: 642.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.04 : 2,029.83 = 428.57 : x
  2. Step 2: Convert to fraction form
    1,353.04/2,029.83 = 428.57/x
  3. Step 3: Cross multiply
    1,353.04x = 2,029.83 × 428.57
  4. Step 4: Simplify right side
    1,353.04x = 869,924.24
  5. Step 5: Solve for x
    x = 869,924.24/1,353.04
  6. Step 6: Final answer
    x = 642.94

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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.