Home / 913,401.85-1,370,102.78-380,745.85

Finding the Fourth Proportional to 913,401.85, 1,370,102.78 and 380,745.85

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Solution

The fourth proportional to 913,401.85, 1,370,102.78 and 380,745.85 is: 571,118.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    913,401.85 : 1,370,102.78 = 380,745.85 : x
  2. Step 2: Convert to fraction form
    913,401.85/1,370,102.78 = 380,745.85/x
  3. Step 3: Cross multiply
    913,401.85x = 1,370,102.78 × 380,745.85
  4. Step 4: Simplify right side
    913,401.85x = 521,660,945,654.73
  5. Step 5: Solve for x
    x = 521,660,945,654.73/913,401.85
  6. Step 6: Final answer
    x = 571,118.78

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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.