Home / 312,121.50-430,681.46-189,550.13

Finding the Fourth Proportional to 312,121.50, 430,681.46 and 189,550.13

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Solution

The fourth proportional to 312,121.50, 430,681.46 and 189,550.13 is: 261,551.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,121.50 : 430,681.46 = 189,550.13 : x
  2. Step 2: Convert to fraction form
    312,121.50/430,681.46 = 189,550.13/x
  3. Step 3: Cross multiply
    312,121.50x = 430,681.46 × 189,550.13
  4. Step 4: Simplify right side
    312,121.50x = 81,635,723,630.43
  5. Step 5: Solve for x
    x = 81,635,723,630.43/312,121.50
  6. Step 6: Final answer
    x = 261,551.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.