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Finding the Fourth Proportional to 1,048.28, 1,445.43 and 669.66

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Solution

The fourth proportional to 1,048.28, 1,445.43 and 669.66 is: 923.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.28 : 1,445.43 = 669.66 : x
  2. Step 2: Convert to fraction form
    1,048.28/1,445.43 = 669.66/x
  3. Step 3: Cross multiply
    1,048.28x = 1,445.43 × 669.66
  4. Step 4: Simplify right side
    1,048.28x = 967,943.74
  5. Step 5: Solve for x
    x = 967,943.74/1,048.28
  6. Step 6: Final answer
    x = 923.37

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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.