Home / 1,438.19-2,155.18-708.29

Finding the Fourth Proportional to 1,438.19, 2,155.18 and 708.29

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Solution

The fourth proportional to 1,438.19, 2,155.18 and 708.29 is: 1,061.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.19 : 2,155.18 = 708.29 : x
  2. Step 2: Convert to fraction form
    1,438.19/2,155.18 = 708.29/x
  3. Step 3: Cross multiply
    1,438.19x = 2,155.18 × 708.29
  4. Step 4: Simplify right side
    1,438.19x = 1,526,492.44
  5. Step 5: Solve for x
    x = 1,526,492.44/1,438.19
  6. Step 6: Final answer
    x = 1,061.40

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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.