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Finding the Fourth Proportional to 404,901.20, 607,351.80 and 142,245.20

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Solution

The fourth proportional to 404,901.20, 607,351.80 and 142,245.20 is: 213,367.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,901.20 : 607,351.80 = 142,245.20 : x
  2. Step 2: Convert to fraction form
    404,901.20/607,351.80 = 142,245.20/x
  3. Step 3: Cross multiply
    404,901.20x = 607,351.80 × 142,245.20
  4. Step 4: Simplify right side
    404,901.20x = 86,392,878,261.36
  5. Step 5: Solve for x
    x = 86,392,878,261.36/404,901.20
  6. Step 6: Final answer
    x = 213,367.80

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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.