Home / 2,447.28-3,670.90-985.40

Finding the Fourth Proportional to 2,447.28, 3,670.90 and 985.40

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Solution

The fourth proportional to 2,447.28, 3,670.90 and 985.40 is: 1,478.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,447.28 : 3,670.90 = 985.40 : x
  2. Step 2: Convert to fraction form
    2,447.28/3,670.90 = 985.40/x
  3. Step 3: Cross multiply
    2,447.28x = 3,670.90 × 985.40
  4. Step 4: Simplify right side
    2,447.28x = 3,617,304.86
  5. Step 5: Solve for x
    x = 3,617,304.86/2,447.28
  6. Step 6: Final answer
    x = 1,478.09

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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.