Home / 819,365.72-1,229,048.60-258,443.96

Finding the Fourth Proportional to 819,365.72, 1,229,048.60 and 258,443.96

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Solution

The fourth proportional to 819,365.72, 1,229,048.60 and 258,443.96 is: 387,665.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,365.72 : 1,229,048.60 = 258,443.96 : x
  2. Step 2: Convert to fraction form
    819,365.72/1,229,048.60 = 258,443.96/x
  3. Step 3: Cross multiply
    819,365.72x = 1,229,048.60 × 258,443.96
  4. Step 4: Simplify right side
    819,365.72x = 317,640,187,216.46
  5. Step 5: Solve for x
    x = 317,640,187,216.46/819,365.72
  6. Step 6: Final answer
    x = 387,665.95

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Double scale
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Similar ratio
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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.