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Finding the Fourth Proportional to 1,048.67, 1,573.01 and 318.25

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Solution

The fourth proportional to 1,048.67, 1,573.01 and 318.25 is: 477.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.67 : 1,573.01 = 318.25 : x
  2. Step 2: Convert to fraction form
    1,048.67/1,573.01 = 318.25/x
  3. Step 3: Cross multiply
    1,048.67x = 1,573.01 × 318.25
  4. Step 4: Simplify right side
    1,048.67x = 500,604.91
  5. Step 5: Solve for x
    x = 500,604.91/1,048.67
  6. Step 6: Final answer
    x = 477.37

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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.