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Finding the Fourth Proportional to 905.64, 1,349.55 and 876.24

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Solution

The fourth proportional to 905.64, 1,349.55 and 876.24 is: 1,305.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.64 : 1,349.55 = 876.24 : x
  2. Step 2: Convert to fraction form
    905.64/1,349.55 = 876.24/x
  3. Step 3: Cross multiply
    905.64x = 1,349.55 × 876.24
  4. Step 4: Simplify right side
    905.64x = 1,182,529.69
  5. Step 5: Solve for x
    x = 1,182,529.69/905.64
  6. Step 6: Final answer
    x = 1,305.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.