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Finding the Fourth Proportional to 308,927.90, 463,391.85 and 131,440.70

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Solution

The fourth proportional to 308,927.90, 463,391.85 and 131,440.70 is: 197,161.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,927.90 : 463,391.85 = 131,440.70 : x
  2. Step 2: Convert to fraction form
    308,927.90/463,391.85 = 131,440.70/x
  3. Step 3: Cross multiply
    308,927.90x = 463,391.85 × 131,440.70
  4. Step 4: Simplify right side
    308,927.90x = 60,908,549,138.30
  5. Step 5: Solve for x
    x = 60,908,549,138.30/308,927.90
  6. Step 6: Final answer
    x = 197,161.05

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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.