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Finding the Fourth Proportional to 869,428.80, 1,199,751.65 and 482,207.69

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Solution

The fourth proportional to 869,428.80, 1,199,751.65 and 482,207.69 is: 665,413.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,428.80 : 1,199,751.65 = 482,207.69 : x
  2. Step 2: Convert to fraction form
    869,428.80/1,199,751.65 = 482,207.69/x
  3. Step 3: Cross multiply
    869,428.80x = 1,199,751.65 × 482,207.69
  4. Step 4: Simplify right side
    869,428.80x = 578,529,469,309.15
  5. Step 5: Solve for x
    x = 578,529,469,309.15/869,428.80
  6. Step 6: Final answer
    x = 665,413.28

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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.