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Finding the Fourth Proportional to 620.07, 855.66 and 340.25

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Solution

The fourth proportional to 620.07, 855.66 and 340.25 is: 469.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.07 : 855.66 = 340.25 : x
  2. Step 2: Convert to fraction form
    620.07/855.66 = 340.25/x
  3. Step 3: Cross multiply
    620.07x = 855.66 × 340.25
  4. Step 4: Simplify right side
    620.07x = 291,138.32
  5. Step 5: Solve for x
    x = 291,138.32/620.07
  6. Step 6: Final answer
    x = 469.52

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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.