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Finding the Fourth Proportional to 1,048.89, 1,447.55 and 629.24

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Solution

The fourth proportional to 1,048.89, 1,447.55 and 629.24 is: 868.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.89 : 1,447.55 = 629.24 : x
  2. Step 2: Convert to fraction form
    1,048.89/1,447.55 = 629.24/x
  3. Step 3: Cross multiply
    1,048.89x = 1,447.55 × 629.24
  4. Step 4: Simplify right side
    1,048.89x = 910,848.34
  5. Step 5: Solve for x
    x = 910,848.34/1,048.89
  6. Step 6: Final answer
    x = 868.39

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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.