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Finding the Fourth Proportional to 1,568.92, 2,165.20 and 905.88

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Solution

The fourth proportional to 1,568.92, 2,165.20 and 905.88 is: 1,250.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,568.92 : 2,165.20 = 905.88 : x
  2. Step 2: Convert to fraction form
    1,568.92/2,165.20 = 905.88/x
  3. Step 3: Cross multiply
    1,568.92x = 2,165.20 × 905.88
  4. Step 4: Simplify right side
    1,568.92x = 1,961,411.38
  5. Step 5: Solve for x
    x = 1,961,411.38/1,568.92
  6. Step 6: Final answer
    x = 1,250.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.