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Finding the Fourth Proportional to 262,400.70, 393,601.05 and 209,912.70

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Solution

The fourth proportional to 262,400.70, 393,601.05 and 209,912.70 is: 314,869.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,400.70 : 393,601.05 = 209,912.70 : x
  2. Step 2: Convert to fraction form
    262,400.70/393,601.05 = 209,912.70/x
  3. Step 3: Cross multiply
    262,400.70x = 393,601.05 × 209,912.70
  4. Step 4: Simplify right side
    262,400.70x = 82,621,859,128.34
  5. Step 5: Solve for x
    x = 82,621,859,128.34/262,400.70
  6. Step 6: Final answer
    x = 314,869.05

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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.