Home / 3,979.48-5,492.34-3,315.28

Finding the Fourth Proportional to 3,979.48, 5,492.34 and 3,315.28

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Solution

The fourth proportional to 3,979.48, 5,492.34 and 3,315.28 is: 4,575.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.48 : 5,492.34 = 3,315.28 : x
  2. Step 2: Convert to fraction form
    3,979.48/5,492.34 = 3,315.28/x
  3. Step 3: Cross multiply
    3,979.48x = 5,492.34 × 3,315.28
  4. Step 4: Simplify right side
    3,979.48x = 18,208,644.96
  5. Step 5: Solve for x
    x = 18,208,644.96/3,979.48
  6. Step 6: Final answer
    x = 4,575.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.