Home / 2,431.10-3,647.23-787.65

Finding the Fourth Proportional to 2,431.10, 3,647.23 and 787.65

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Solution

The fourth proportional to 2,431.10, 3,647.23 and 787.65 is: 1,181.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,431.10 : 3,647.23 = 787.65 : x
  2. Step 2: Convert to fraction form
    2,431.10/3,647.23 = 787.65/x
  3. Step 3: Cross multiply
    2,431.10x = 3,647.23 × 787.65
  4. Step 4: Simplify right side
    2,431.10x = 2,872,740.71
  5. Step 5: Solve for x
    x = 2,872,740.71/2,431.10
  6. Step 6: Final answer
    x = 1,181.66

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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.