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Finding the Fourth Proportional to 413,821.20, 620,731.80 and 245,859.60

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Solution

The fourth proportional to 413,821.20, 620,731.80 and 245,859.60 is: 368,789.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,821.20 : 620,731.80 = 245,859.60 : x
  2. Step 2: Convert to fraction form
    413,821.20/620,731.80 = 245,859.60/x
  3. Step 3: Cross multiply
    413,821.20x = 620,731.80 × 245,859.60
  4. Step 4: Simplify right side
    413,821.20x = 152,612,872,055.28
  5. Step 5: Solve for x
    x = 152,612,872,055.28/413,821.20
  6. Step 6: Final answer
    x = 368,789.40

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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.