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Finding the Fourth Proportional to 315,401.20, 472,324.20 and 209,647.60

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Solution

The fourth proportional to 315,401.20, 472,324.20 and 209,647.60 is: 313,954.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,401.20 : 472,324.20 = 209,647.60 : x
  2. Step 2: Convert to fraction form
    315,401.20/472,324.20 = 209,647.60/x
  3. Step 3: Cross multiply
    315,401.20x = 472,324.20 × 209,647.60
  4. Step 4: Simplify right side
    315,401.20x = 99,021,634,951.92
  5. Step 5: Solve for x
    x = 99,021,634,951.92/315,401.20
  6. Step 6: Final answer
    x = 313,954.53

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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.