Home / 1,278.27-1,917.18-353.93

Finding the Fourth Proportional to 1,278.27, 1,917.18 and 353.93

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Solution

The fourth proportional to 1,278.27, 1,917.18 and 353.93 is: 530.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.27 : 1,917.18 = 353.93 : x
  2. Step 2: Convert to fraction form
    1,278.27/1,917.18 = 353.93/x
  3. Step 3: Cross multiply
    1,278.27x = 1,917.18 × 353.93
  4. Step 4: Simplify right side
    1,278.27x = 678,537.93
  5. Step 5: Solve for x
    x = 678,537.93/1,278.27
  6. Step 6: Final answer
    x = 530.83

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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.