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Finding the Fourth Proportional to 947.16, 1,415.25 and 741.24

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Solution

The fourth proportional to 947.16, 1,415.25 and 741.24 is: 1,107.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.16 : 1,415.25 = 741.24 : x
  2. Step 2: Convert to fraction form
    947.16/1,415.25 = 741.24/x
  3. Step 3: Cross multiply
    947.16x = 1,415.25 × 741.24
  4. Step 4: Simplify right side
    947.16x = 1,049,039.91
  5. Step 5: Solve for x
    x = 1,049,039.91/947.16
  6. Step 6: Final answer
    x = 1,107.56

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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.