Home / 1,447.40-2,174.57-928.42

Finding the Fourth Proportional to 1,447.40, 2,174.57 and 928.42

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Solution

The fourth proportional to 1,447.40, 2,174.57 and 928.42 is: 1,394.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.40 : 2,174.57 = 928.42 : x
  2. Step 2: Convert to fraction form
    1,447.40/2,174.57 = 928.42/x
  3. Step 3: Cross multiply
    1,447.40x = 2,174.57 × 928.42
  4. Step 4: Simplify right side
    1,447.40x = 2,018,911.16
  5. Step 5: Solve for x
    x = 2,018,911.16/1,447.40
  6. Step 6: Final answer
    x = 1,394.85

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1.5x scale

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.