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Finding the Fourth Proportional to 741.39, 1,023.21 and 479.22

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Solution

The fourth proportional to 741.39, 1,023.21 and 479.22 is: 661.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.39 : 1,023.21 = 479.22 : x
  2. Step 2: Convert to fraction form
    741.39/1,023.21 = 479.22/x
  3. Step 3: Cross multiply
    741.39x = 1,023.21 × 479.22
  4. Step 4: Simplify right side
    741.39x = 490,342.70
  5. Step 5: Solve for x
    x = 490,342.70/741.39
  6. Step 6: Final answer
    x = 661.38

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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.