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Finding the Fourth Proportional to 207,640.80, 311,461.20 and 155,152.80

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Solution

The fourth proportional to 207,640.80, 311,461.20 and 155,152.80 is: 232,729.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,640.80 : 311,461.20 = 155,152.80 : x
  2. Step 2: Convert to fraction form
    207,640.80/311,461.20 = 155,152.80/x
  3. Step 3: Cross multiply
    207,640.80x = 311,461.20 × 155,152.80
  4. Step 4: Simplify right side
    207,640.80x = 48,324,077,271.36
  5. Step 5: Solve for x
    x = 48,324,077,271.36/207,640.80
  6. Step 6: Final answer
    x = 232,729.20

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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.