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Finding the Fourth Proportional to 2,318.40, 3,474.52 and 856.20

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Solution

The fourth proportional to 2,318.40, 3,474.52 and 856.20 is: 1,283.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,318.40 : 3,474.52 = 856.20 : x
  2. Step 2: Convert to fraction form
    2,318.40/3,474.52 = 856.20/x
  3. Step 3: Cross multiply
    2,318.40x = 3,474.52 × 856.20
  4. Step 4: Simplify right side
    2,318.40x = 2,974,884.02
  5. Step 5: Solve for x
    x = 2,974,884.02/2,318.40
  6. Step 6: Final answer
    x = 1,283.16

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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.