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Finding the Fourth Proportional to 413,570.40, 620,355.60 and 396,074.40

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Solution

The fourth proportional to 413,570.40, 620,355.60 and 396,074.40 is: 594,111.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,570.40 : 620,355.60 = 396,074.40 : x
  2. Step 2: Convert to fraction form
    413,570.40/620,355.60 = 396,074.40/x
  3. Step 3: Cross multiply
    413,570.40x = 620,355.60 × 396,074.40
  4. Step 4: Simplify right side
    413,570.40x = 245,706,972,056.64
  5. Step 5: Solve for x
    x = 245,706,972,056.64/413,570.40
  6. Step 6: Final answer
    x = 594,111.60

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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.