Home / 1,431.75-2,145.33-608.13

Finding the Fourth Proportional to 1,431.75, 2,145.33 and 608.13

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Solution

The fourth proportional to 1,431.75, 2,145.33 and 608.13 is: 911.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.75 : 2,145.33 = 608.13 : x
  2. Step 2: Convert to fraction form
    1,431.75/2,145.33 = 608.13/x
  3. Step 3: Cross multiply
    1,431.75x = 2,145.33 × 608.13
  4. Step 4: Simplify right side
    1,431.75x = 1,304,639.53
  5. Step 5: Solve for x
    x = 1,304,639.53/1,431.75
  6. Step 6: Final answer
    x = 911.22

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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.