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Finding the Fourth Proportional to 625.10, 862.48 and 448.03

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Solution

The fourth proportional to 625.10, 862.48 and 448.03 is: 618.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.10 : 862.48 = 448.03 : x
  2. Step 2: Convert to fraction form
    625.10/862.48 = 448.03/x
  3. Step 3: Cross multiply
    625.10x = 862.48 × 448.03
  4. Step 4: Simplify right side
    625.10x = 386,412.60
  5. Step 5: Solve for x
    x = 386,412.60/625.10
  6. Step 6: Final answer
    x = 618.16

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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.