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Finding the Fourth Proportional to 759.27, 1,047.42 and 479.19

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Solution

The fourth proportional to 759.27, 1,047.42 and 479.19 is: 661.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.27 : 1,047.42 = 479.19 : x
  2. Step 2: Convert to fraction form
    759.27/1,047.42 = 479.19/x
  3. Step 3: Cross multiply
    759.27x = 1,047.42 × 479.19
  4. Step 4: Simplify right side
    759.27x = 501,913.19
  5. Step 5: Solve for x
    x = 501,913.19/759.27
  6. Step 6: Final answer
    x = 661.05

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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.