Home / 685,867.54-1,028,801.43-286,290.34

Finding the Fourth Proportional to 685,867.54, 1,028,801.43 and 286,290.34

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Solution

The fourth proportional to 685,867.54, 1,028,801.43 and 286,290.34 is: 429,435.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,867.54 : 1,028,801.43 = 286,290.34 : x
  2. Step 2: Convert to fraction form
    685,867.54/1,028,801.43 = 286,290.34/x
  3. Step 3: Cross multiply
    685,867.54x = 1,028,801.43 × 286,290.34
  4. Step 4: Simplify right side
    685,867.54x = 294,535,909,755.74
  5. Step 5: Solve for x
    x = 294,535,909,755.74/685,867.54
  6. Step 6: Final answer
    x = 429,435.56

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Double scale
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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.