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Finding the Fourth Proportional to 1,395.71, 2,093.58 and 421.82

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Solution

The fourth proportional to 1,395.71, 2,093.58 and 421.82 is: 632.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.71 : 2,093.58 = 421.82 : x
  2. Step 2: Convert to fraction form
    1,395.71/2,093.58 = 421.82/x
  3. Step 3: Cross multiply
    1,395.71x = 2,093.58 × 421.82
  4. Step 4: Simplify right side
    1,395.71x = 883,113.92
  5. Step 5: Solve for x
    x = 883,113.92/1,395.71
  6. Step 6: Final answer
    x = 632.73

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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.