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Finding the Fourth Proportional to 413,775.60, 620,663.40 and 133,321.20

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Solution

The fourth proportional to 413,775.60, 620,663.40 and 133,321.20 is: 199,981.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,775.60 : 620,663.40 = 133,321.20 : x
  2. Step 2: Convert to fraction form
    413,775.60/620,663.40 = 133,321.20/x
  3. Step 3: Cross multiply
    413,775.60x = 620,663.40 × 133,321.20
  4. Step 4: Simplify right side
    413,775.60x = 82,747,589,284.08
  5. Step 5: Solve for x
    x = 82,747,589,284.08/413,775.60
  6. Step 6: Final answer
    x = 199,981.80

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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.