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Finding the Fourth Proportional to 280,763.33, 387,453.60 and 153,438.93

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Solution

The fourth proportional to 280,763.33, 387,453.60 and 153,438.93 is: 211,745.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,763.33 : 387,453.60 = 153,438.93 : x
  2. Step 2: Convert to fraction form
    280,763.33/387,453.60 = 153,438.93/x
  3. Step 3: Cross multiply
    280,763.33x = 387,453.60 × 153,438.93
  4. Step 4: Simplify right side
    280,763.33x = 59,450,465,808.65
  5. Step 5: Solve for x
    x = 59,450,465,808.65/280,763.33
  6. Step 6: Final answer
    x = 211,745.84

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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.