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Finding the Fourth Proportional to 1,395.61, 2,093.78 and 615.77

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Solution

The fourth proportional to 1,395.61, 2,093.78 and 615.77 is: 923.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.61 : 2,093.78 = 615.77 : x
  2. Step 2: Convert to fraction form
    1,395.61/2,093.78 = 615.77/x
  3. Step 3: Cross multiply
    1,395.61x = 2,093.78 × 615.77
  4. Step 4: Simplify right side
    1,395.61x = 1,289,293.68
  5. Step 5: Solve for x
    x = 1,289,293.68/1,395.61
  6. Step 6: Final answer
    x = 923.82

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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.