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Finding the Fourth Proportional to 1,943.32, 2,914.68 and 644.64

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Solution

The fourth proportional to 1,943.32, 2,914.68 and 644.64 is: 966.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,943.32 : 2,914.68 = 644.64 : x
  2. Step 2: Convert to fraction form
    1,943.32/2,914.68 = 644.64/x
  3. Step 3: Cross multiply
    1,943.32x = 2,914.68 × 644.64
  4. Step 4: Simplify right side
    1,943.32x = 1,878,919.32
  5. Step 5: Solve for x
    x = 1,878,919.32/1,943.32
  6. Step 6: Final answer
    x = 966.86

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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.