Home / 685,870.32-1,028,640.22-205,997.16

Finding the Fourth Proportional to 685,870.32, 1,028,640.22 and 205,997.16

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Solution

The fourth proportional to 685,870.32, 1,028,640.22 and 205,997.16 is: 308,946.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,870.32 : 1,028,640.22 = 205,997.16 : x
  2. Step 2: Convert to fraction form
    685,870.32/1,028,640.22 = 205,997.16/x
  3. Step 3: Cross multiply
    685,870.32x = 1,028,640.22 × 205,997.16
  4. Step 4: Simplify right side
    685,870.32x = 211,896,963,981.78
  5. Step 5: Solve for x
    x = 211,896,963,981.78/685,870.32
  6. Step 6: Final answer
    x = 308,946.11

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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.