Home / 1,295.28-1,942.11-429.39

Finding the Fourth Proportional to 1,295.28, 1,942.11 and 429.39

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Solution

The fourth proportional to 1,295.28, 1,942.11 and 429.39 is: 643.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.28 : 1,942.11 = 429.39 : x
  2. Step 2: Convert to fraction form
    1,295.28/1,942.11 = 429.39/x
  3. Step 3: Cross multiply
    1,295.28x = 1,942.11 × 429.39
  4. Step 4: Simplify right side
    1,295.28x = 833,922.61
  5. Step 5: Solve for x
    x = 833,922.61/1,295.28
  6. Step 6: Final answer
    x = 643.82

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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.