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Finding the Fourth Proportional to 470.39, 704.70 and 388.04

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Solution

The fourth proportional to 470.39, 704.70 and 388.04 is: 581.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.39 : 704.70 = 388.04 : x
  2. Step 2: Convert to fraction form
    470.39/704.70 = 388.04/x
  3. Step 3: Cross multiply
    470.39x = 704.70 × 388.04
  4. Step 4: Simplify right side
    470.39x = 273,448.26
  5. Step 5: Solve for x
    x = 273,448.26/470.39
  6. Step 6: Final answer
    x = 581.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.