Home / 1,358.38-2,038.94-918.25

Finding the Fourth Proportional to 1,358.38, 2,038.94 and 918.25

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Solution

The fourth proportional to 1,358.38, 2,038.94 and 918.25 is: 1,378.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.38 : 2,038.94 = 918.25 : x
  2. Step 2: Convert to fraction form
    1,358.38/2,038.94 = 918.25/x
  3. Step 3: Cross multiply
    1,358.38x = 2,038.94 × 918.25
  4. Step 4: Simplify right side
    1,358.38x = 1,872,250.41
  5. Step 5: Solve for x
    x = 1,872,250.41/1,358.38
  6. Step 6: Final answer
    x = 1,378.30

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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.