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Finding the Fourth Proportional to 1,004.51, 1,506.56 and 388.31

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Solution

The fourth proportional to 1,004.51, 1,506.56 and 388.31 is: 582.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.51 : 1,506.56 = 388.31 : x
  2. Step 2: Convert to fraction form
    1,004.51/1,506.56 = 388.31/x
  3. Step 3: Cross multiply
    1,004.51x = 1,506.56 × 388.31
  4. Step 4: Simplify right side
    1,004.51x = 585,002.84
  5. Step 5: Solve for x
    x = 585,002.84/1,004.51
  6. Step 6: Final answer
    x = 582.38

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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.