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Finding the Fourth Proportional to 741.14, 1,111.55 and 412.38

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Solution

The fourth proportional to 741.14, 1,111.55 and 412.38 is: 618.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.14 : 1,111.55 = 412.38 : x
  2. Step 2: Convert to fraction form
    741.14/1,111.55 = 412.38/x
  3. Step 3: Cross multiply
    741.14x = 1,111.55 × 412.38
  4. Step 4: Simplify right side
    741.14x = 458,378.93
  5. Step 5: Solve for x
    x = 458,378.93/741.14
  6. Step 6: Final answer
    x = 618.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.