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Finding the Fourth Proportional to 413,799.20, 620,115.60 and 255,557.60

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Solution

The fourth proportional to 413,799.20, 620,115.60 and 255,557.60 is: 382,976.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,799.20 : 620,115.60 = 255,557.60 : x
  2. Step 2: Convert to fraction form
    413,799.20/620,115.60 = 255,557.60/x
  3. Step 3: Cross multiply
    413,799.20x = 620,115.60 × 255,557.60
  4. Step 4: Simplify right side
    413,799.20x = 158,475,254,458.56
  5. Step 5: Solve for x
    x = 158,475,254,458.56/413,799.20
  6. Step 6: Final answer
    x = 382,976.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.