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Finding the Fourth Proportional to 2,579.53, 3,869.37 and 631.74

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Solution

The fourth proportional to 2,579.53, 3,869.37 and 631.74 is: 947.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,579.53 : 3,869.37 = 631.74 : x
  2. Step 2: Convert to fraction form
    2,579.53/3,869.37 = 631.74/x
  3. Step 3: Cross multiply
    2,579.53x = 3,869.37 × 631.74
  4. Step 4: Simplify right side
    2,579.53x = 2,444,435.80
  5. Step 5: Solve for x
    x = 2,444,435.80/2,579.53
  6. Step 6: Final answer
    x = 947.63

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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.