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Finding the Fourth Proportional to 947.24, 1,307.16 and 919.29

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Solution

The fourth proportional to 947.24, 1,307.16 and 919.29 is: 1,268.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.24 : 1,307.16 = 919.29 : x
  2. Step 2: Convert to fraction form
    947.24/1,307.16 = 919.29/x
  3. Step 3: Cross multiply
    947.24x = 1,307.16 × 919.29
  4. Step 4: Simplify right side
    947.24x = 1,201,659.12
  5. Step 5: Solve for x
    x = 1,201,659.12/947.24
  6. Step 6: Final answer
    x = 1,268.60

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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.