Home / 1,438.24-2,157.27-707.57

Finding the Fourth Proportional to 1,438.24, 2,157.27 and 707.57

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Solution

The fourth proportional to 1,438.24, 2,157.27 and 707.57 is: 1,061.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.24 : 2,157.27 = 707.57 : x
  2. Step 2: Convert to fraction form
    1,438.24/2,157.27 = 707.57/x
  3. Step 3: Cross multiply
    1,438.24x = 2,157.27 × 707.57
  4. Step 4: Simplify right side
    1,438.24x = 1,526,419.53
  5. Step 5: Solve for x
    x = 1,526,419.53/1,438.24
  6. Step 6: Final answer
    x = 1,061.31

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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.