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Finding the Fourth Proportional to 741.23, 1,019.63 and 711.26

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Solution

The fourth proportional to 741.23, 1,019.63 and 711.26 is: 978.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.23 : 1,019.63 = 711.26 : x
  2. Step 2: Convert to fraction form
    741.23/1,019.63 = 711.26/x
  3. Step 3: Cross multiply
    741.23x = 1,019.63 × 711.26
  4. Step 4: Simplify right side
    741.23x = 725,213.38
  5. Step 5: Solve for x
    x = 725,213.38/741.23
  6. Step 6: Final answer
    x = 978.40

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1.5x scale

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.