Home / 1,436.79-2,155.20-396.69

Finding the Fourth Proportional to 1,436.79, 2,155.20 and 396.69

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Solution

The fourth proportional to 1,436.79, 2,155.20 and 396.69 is: 595.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,436.79 : 2,155.20 = 396.69 : x
  2. Step 2: Convert to fraction form
    1,436.79/2,155.20 = 396.69/x
  3. Step 3: Cross multiply
    1,436.79x = 2,155.20 × 396.69
  4. Step 4: Simplify right side
    1,436.79x = 854,946.29
  5. Step 5: Solve for x
    x = 854,946.29/1,436.79
  6. Step 6: Final answer
    x = 595.04

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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.