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Finding the Fourth Proportional to 483,790.22, 721,603.69 and 420,109.64

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Solution

The fourth proportional to 483,790.22, 721,603.69 and 420,109.64 is: 626,620.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,790.22 : 721,603.69 = 420,109.64 : x
  2. Step 2: Convert to fraction form
    483,790.22/721,603.69 = 420,109.64/x
  3. Step 3: Cross multiply
    483,790.22x = 721,603.69 × 420,109.64
  4. Step 4: Simplify right side
    483,790.22x = 303,152,664,476.29
  5. Step 5: Solve for x
    x = 303,152,664,476.29/483,790.22
  6. Step 6: Final answer
    x = 626,620.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.