Home / 2,812.60-4,219.80-964.90

Finding the Fourth Proportional to 2,812.60, 4,219.80 and 964.90

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Solution

The fourth proportional to 2,812.60, 4,219.80 and 964.90 is: 1,447.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.60 : 4,219.80 = 964.90 : x
  2. Step 2: Convert to fraction form
    2,812.60/4,219.80 = 964.90/x
  3. Step 3: Cross multiply
    2,812.60x = 4,219.80 × 964.90
  4. Step 4: Simplify right side
    2,812.60x = 4,071,685.02
  5. Step 5: Solve for x
    x = 4,071,685.02/2,812.60
  6. Step 6: Final answer
    x = 1,447.66

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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.