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Finding the Fourth Proportional to 251,998.40, 378,289.20 and 145,467.20

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Solution

The fourth proportional to 251,998.40, 378,289.20 and 145,467.20 is: 218,369.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,998.40 : 378,289.20 = 145,467.20 : x
  2. Step 2: Convert to fraction form
    251,998.40/378,289.20 = 145,467.20/x
  3. Step 3: Cross multiply
    251,998.40x = 378,289.20 × 145,467.20
  4. Step 4: Simplify right side
    251,998.40x = 55,028,670,714.24
  5. Step 5: Solve for x
    x = 55,028,670,714.24/251,998.40
  6. Step 6: Final answer
    x = 218,369.13

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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.