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Finding the Fourth Proportional to 399,640.80, 599,461.20 and 366,981.60

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Solution

The fourth proportional to 399,640.80, 599,461.20 and 366,981.60 is: 550,472.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,640.80 : 599,461.20 = 366,981.60 : x
  2. Step 2: Convert to fraction form
    399,640.80/599,461.20 = 366,981.60/x
  3. Step 3: Cross multiply
    399,640.80x = 599,461.20 × 366,981.60
  4. Step 4: Simplify right side
    399,640.80x = 219,991,230,313.92
  5. Step 5: Solve for x
    x = 219,991,230,313.92/399,640.80
  6. Step 6: Final answer
    x = 550,472.40

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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.