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Finding the Fourth Proportional to 456,019.20, 629,726.40 and 305,553.60

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Solution

The fourth proportional to 456,019.20, 629,726.40 and 305,553.60 is: 421,945.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,019.20 : 629,726.40 = 305,553.60 : x
  2. Step 2: Convert to fraction form
    456,019.20/629,726.40 = 305,553.60/x
  3. Step 3: Cross multiply
    456,019.20x = 629,726.40 × 305,553.60
  4. Step 4: Simplify right side
    456,019.20x = 192,415,168,535.04
  5. Step 5: Solve for x
    x = 192,415,168,535.04/456,019.20
  6. Step 6: Final answer
    x = 421,945.32

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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.