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Finding the Fourth Proportional to 741.52, 1,022.79 and 479.47

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Solution

The fourth proportional to 741.52, 1,022.79 and 479.47 is: 661.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.52 : 1,022.79 = 479.47 : x
  2. Step 2: Convert to fraction form
    741.52/1,022.79 = 479.47/x
  3. Step 3: Cross multiply
    741.52x = 1,022.79 × 479.47
  4. Step 4: Simplify right side
    741.52x = 490,397.12
  5. Step 5: Solve for x
    x = 490,397.12/741.52
  6. Step 6: Final answer
    x = 661.34

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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.