Home / 1,435.30-2,151.55-613.78

Finding the Fourth Proportional to 1,435.30, 2,151.55 and 613.78

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Solution

The fourth proportional to 1,435.30, 2,151.55 and 613.78 is: 920.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.30 : 2,151.55 = 613.78 : x
  2. Step 2: Convert to fraction form
    1,435.30/2,151.55 = 613.78/x
  3. Step 3: Cross multiply
    1,435.30x = 2,151.55 × 613.78
  4. Step 4: Simplify right side
    1,435.30x = 1,320,578.36
  5. Step 5: Solve for x
    x = 1,320,578.36/1,435.30
  6. Step 6: Final answer
    x = 920.07

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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.