Home / 3,130.20-4,695.08-938.76

Finding the Fourth Proportional to 3,130.20, 4,695.08 and 938.76

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Solution

The fourth proportional to 3,130.20, 4,695.08 and 938.76 is: 1,408.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.20 : 4,695.08 = 938.76 : x
  2. Step 2: Convert to fraction form
    3,130.20/4,695.08 = 938.76/x
  3. Step 3: Cross multiply
    3,130.20x = 4,695.08 × 938.76
  4. Step 4: Simplify right side
    3,130.20x = 4,407,553.30
  5. Step 5: Solve for x
    x = 4,407,553.30/3,130.20
  6. Step 6: Final answer
    x = 1,408.07

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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.