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Finding the Fourth Proportional to 262,401.40, 393,018.90 and 215,745.40

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Solution

The fourth proportional to 262,401.40, 393,018.90 and 215,745.40 is: 323,138.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,401.40 : 393,018.90 = 215,745.40 : x
  2. Step 2: Convert to fraction form
    262,401.40/393,018.90 = 215,745.40/x
  3. Step 3: Cross multiply
    262,401.40x = 393,018.90 × 215,745.40
  4. Step 4: Simplify right side
    262,401.40x = 84,792,019,788.06
  5. Step 5: Solve for x
    x = 84,792,019,788.06/262,401.40
  6. Step 6: Final answer
    x = 323,138.60

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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.