Home / 1,256.27-1,884.20-390.38

Finding the Fourth Proportional to 1,256.27, 1,884.20 and 390.38

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Solution

The fourth proportional to 1,256.27, 1,884.20 and 390.38 is: 585.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.27 : 1,884.20 = 390.38 : x
  2. Step 2: Convert to fraction form
    1,256.27/1,884.20 = 390.38/x
  3. Step 3: Cross multiply
    1,256.27x = 1,884.20 × 390.38
  4. Step 4: Simplify right side
    1,256.27x = 735,542.62
  5. Step 5: Solve for x
    x = 735,542.62/1,256.27
  6. Step 6: Final answer
    x = 585.50

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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.