Home / 685,986-1,028,979.60-286,408.95

Finding the Fourth Proportional to 685,986, 1,028,979.60 and 286,408.95

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Solution

The fourth proportional to 685,986, 1,028,979.60 and 286,408.95 is: 429,613.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,986 : 1,028,979.60 = 286,408.95 : x
  2. Step 2: Convert to fraction form
    685,986/1,028,979.60 = 286,408.95/x
  3. Step 3: Cross multiply
    685,986x = 1,028,979.60 × 286,408.95
  4. Step 4: Simplify right side
    685,986x = 294,708,966,807.42
  5. Step 5: Solve for x
    x = 294,708,966,807.42/685,986
  6. Step 6: Final answer
    x = 429,613.68

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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.