Home / 685,278.63-1,028,151.45-205,518.06

Finding the Fourth Proportional to 685,278.63, 1,028,151.45 and 205,518.06

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Solution

The fourth proportional to 685,278.63, 1,028,151.45 and 205,518.06 is: 308,347.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,278.63 : 1,028,151.45 = 205,518.06 : x
  2. Step 2: Convert to fraction form
    685,278.63/1,028,151.45 = 205,518.06/x
  3. Step 3: Cross multiply
    685,278.63x = 1,028,151.45 × 205,518.06
  4. Step 4: Simplify right side
    685,278.63x = 211,303,691,390.19
  5. Step 5: Solve for x
    x = 211,303,691,390.19/685,278.63
  6. Step 6: Final answer
    x = 308,347.12

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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.