Home / 1,787.48-2,678.82-1,555.28

Finding the Fourth Proportional to 1,787.48, 2,678.82 and 1,555.28

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Solution

The fourth proportional to 1,787.48, 2,678.82 and 1,555.28 is: 2,330.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.48 : 2,678.82 = 1,555.28 : x
  2. Step 2: Convert to fraction form
    1,787.48/2,678.82 = 1,555.28/x
  3. Step 3: Cross multiply
    1,787.48x = 2,678.82 × 1,555.28
  4. Step 4: Simplify right side
    1,787.48x = 4,166,315.17
  5. Step 5: Solve for x
    x = 4,166,315.17/1,787.48
  6. Step 6: Final answer
    x = 2,330.83

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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.