Home / 1,438.28-2,157.95-617.19

Finding the Fourth Proportional to 1,438.28, 2,157.95 and 617.19

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Solution

The fourth proportional to 1,438.28, 2,157.95 and 617.19 is: 926.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.28 : 2,157.95 = 617.19 : x
  2. Step 2: Convert to fraction form
    1,438.28/2,157.95 = 617.19/x
  3. Step 3: Cross multiply
    1,438.28x = 2,157.95 × 617.19
  4. Step 4: Simplify right side
    1,438.28x = 1,331,865.16
  5. Step 5: Solve for x
    x = 1,331,865.16/1,438.28
  6. Step 6: Final answer
    x = 926.01

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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.