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Finding the Fourth Proportional to 215,047.49, 320,960.05 and 211,500.01

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Solution

The fourth proportional to 215,047.49, 320,960.05 and 211,500.01 is: 315,665.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,047.49 : 320,960.05 = 211,500.01 : x
  2. Step 2: Convert to fraction form
    215,047.49/320,960.05 = 211,500.01/x
  3. Step 3: Cross multiply
    215,047.49x = 320,960.05 × 211,500.01
  4. Step 4: Simplify right side
    215,047.49x = 67,883,052,179.80
  5. Step 5: Solve for x
    x = 67,883,052,179.80/215,047.49
  6. Step 6: Final answer
    x = 315,665.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.