Home / 1,439.35-2,157.53-618.14

Finding the Fourth Proportional to 1,439.35, 2,157.53 and 618.14

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Solution

The fourth proportional to 1,439.35, 2,157.53 and 618.14 is: 926.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.35 : 2,157.53 = 618.14 : x
  2. Step 2: Convert to fraction form
    1,439.35/2,157.53 = 618.14/x
  3. Step 3: Cross multiply
    1,439.35x = 2,157.53 × 618.14
  4. Step 4: Simplify right side
    1,439.35x = 1,333,662.53
  5. Step 5: Solve for x
    x = 1,333,662.53/1,439.35
  6. Step 6: Final answer
    x = 926.57

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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.