Home / 1,438.07-2,156.70-397.83

Finding the Fourth Proportional to 1,438.07, 2,156.70 and 397.83

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Solution

The fourth proportional to 1,438.07, 2,156.70 and 397.83 is: 596.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.07 : 2,156.70 = 397.83 : x
  2. Step 2: Convert to fraction form
    1,438.07/2,156.70 = 397.83/x
  3. Step 3: Cross multiply
    1,438.07x = 2,156.70 × 397.83
  4. Step 4: Simplify right side
    1,438.07x = 857,999.96
  5. Step 5: Solve for x
    x = 857,999.96/1,438.07
  6. Step 6: Final answer
    x = 596.63

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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.