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Finding the Fourth Proportional to 741.48, 1,023.21 and 479.58

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Solution

The fourth proportional to 741.48, 1,023.21 and 479.58 is: 661.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.48 : 1,023.21 = 479.58 : x
  2. Step 2: Convert to fraction form
    741.48/1,023.21 = 479.58/x
  3. Step 3: Cross multiply
    741.48x = 1,023.21 × 479.58
  4. Step 4: Simplify right side
    741.48x = 490,711.05
  5. Step 5: Solve for x
    x = 490,711.05/741.48
  6. Step 6: Final answer
    x = 661.80

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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.