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Finding the Fourth Proportional to 741.27, 1,022.95 and 479.28

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Solution

The fourth proportional to 741.27, 1,022.95 and 479.28 is: 661.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.27 : 1,022.95 = 479.28 : x
  2. Step 2: Convert to fraction form
    741.27/1,022.95 = 479.28/x
  3. Step 3: Cross multiply
    741.27x = 1,022.95 × 479.28
  4. Step 4: Simplify right side
    741.27x = 490,277.08
  5. Step 5: Solve for x
    x = 490,277.08/741.27
  6. Step 6: Final answer
    x = 661.40

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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.