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Finding the Fourth Proportional to 620.19, 845.10 and 618.03

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Solution

The fourth proportional to 620.19, 845.10 and 618.03 is: 842.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.19 : 845.10 = 618.03 : x
  2. Step 2: Convert to fraction form
    620.19/845.10 = 618.03/x
  3. Step 3: Cross multiply
    620.19x = 845.10 × 618.03
  4. Step 4: Simplify right side
    620.19x = 522,297.15
  5. Step 5: Solve for x
    x = 522,297.15/620.19
  6. Step 6: Final answer
    x = 842.16

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.