Home / 3,130.31-4,694.32-938.30

Finding the Fourth Proportional to 3,130.31, 4,694.32 and 938.30

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Solution

The fourth proportional to 3,130.31, 4,694.32 and 938.30 is: 1,407.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.31 : 4,694.32 = 938.30 : x
  2. Step 2: Convert to fraction form
    3,130.31/4,694.32 = 938.30/x
  3. Step 3: Cross multiply
    3,130.31x = 4,694.32 × 938.30
  4. Step 4: Simplify right side
    3,130.31x = 4,404,680.46
  5. Step 5: Solve for x
    x = 4,404,680.46/3,130.31
  6. Step 6: Final answer
    x = 1,407.11

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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.