Home / 685,280.69-1,028,154.55-205,520.12

Finding the Fourth Proportional to 685,280.69, 1,028,154.55 and 205,520.12

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Solution

The fourth proportional to 685,280.69, 1,028,154.55 and 205,520.12 is: 308,350.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,280.69 : 1,028,154.55 = 205,520.12 : x
  2. Step 2: Convert to fraction form
    685,280.69/1,028,154.55 = 205,520.12/x
  3. Step 3: Cross multiply
    685,280.69x = 1,028,154.55 × 205,520.12
  4. Step 4: Simplify right side
    685,280.69x = 211,306,448,551.13
  5. Step 5: Solve for x
    x = 211,306,448,551.13/685,280.69
  6. Step 6: Final answer
    x = 308,350.21

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1.5x scale

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.