Home / 685,307.49-1,026,837.66-485,268.78

Finding the Fourth Proportional to 685,307.49, 1,026,837.66 and 485,268.78

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Solution

The fourth proportional to 685,307.49, 1,026,837.66 and 485,268.78 is: 727,107.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,307.49 : 1,026,837.66 = 485,268.78 : x
  2. Step 2: Convert to fraction form
    685,307.49/1,026,837.66 = 485,268.78/x
  3. Step 3: Cross multiply
    685,307.49x = 1,026,837.66 × 485,268.78
  4. Step 4: Simplify right side
    685,307.49x = 498,292,258,526.26
  5. Step 5: Solve for x
    x = 498,292,258,526.26/685,307.49
  6. Step 6: Final answer
    x = 727,107.56

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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.