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Finding the Fourth Proportional to 620,033.40, 855,739.47 and 378,456.33

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Solution

The fourth proportional to 620,033.40, 855,739.47 and 378,456.33 is: 522,326.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,033.40 : 855,739.47 = 378,456.33 : x
  2. Step 2: Convert to fraction form
    620,033.40/855,739.47 = 378,456.33/x
  3. Step 3: Cross multiply
    620,033.40x = 855,739.47 × 378,456.33
  4. Step 4: Simplify right side
    620,033.40x = 323,860,019,252.35
  5. Step 5: Solve for x
    x = 323,860,019,252.35/620,033.40
  6. Step 6: Final answer
    x = 522,326.73

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1.5x scale

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.