Home / 1,436.58-2,155.08-511.87

Finding the Fourth Proportional to 1,436.58, 2,155.08 and 511.87

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Solution

The fourth proportional to 1,436.58, 2,155.08 and 511.87 is: 767.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,436.58 : 2,155.08 = 511.87 : x
  2. Step 2: Convert to fraction form
    1,436.58/2,155.08 = 511.87/x
  3. Step 3: Cross multiply
    1,436.58x = 2,155.08 × 511.87
  4. Step 4: Simplify right side
    1,436.58x = 1,103,107.46
  5. Step 5: Solve for x
    x = 1,103,107.46/1,436.58
  6. Step 6: Final answer
    x = 767.87

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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.