Home / 685,867.79-1,028,801.80-286,290.59

Finding the Fourth Proportional to 685,867.79, 1,028,801.80 and 286,290.59

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Solution

The fourth proportional to 685,867.79, 1,028,801.80 and 286,290.59 is: 429,435.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,867.79 : 1,028,801.80 = 286,290.59 : x
  2. Step 2: Convert to fraction form
    685,867.79/1,028,801.80 = 286,290.59/x
  3. Step 3: Cross multiply
    685,867.79x = 1,028,801.80 × 286,290.59
  4. Step 4: Simplify right side
    685,867.79x = 294,536,272,313.33
  5. Step 5: Solve for x
    x = 294,536,272,313.33/685,867.79
  6. Step 6: Final answer
    x = 429,435.93

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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.