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Finding the Fourth Proportional to 741.12, 1,022.73 and 409.50

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Solution

The fourth proportional to 741.12, 1,022.73 and 409.50 is: 565.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.12 : 1,022.73 = 409.50 : x
  2. Step 2: Convert to fraction form
    741.12/1,022.73 = 409.50/x
  3. Step 3: Cross multiply
    741.12x = 1,022.73 × 409.50
  4. Step 4: Simplify right side
    741.12x = 418,807.94
  5. Step 5: Solve for x
    x = 418,807.94/741.12
  6. Step 6: Final answer
    x = 565.10

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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.