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Finding the Fourth Proportional to 280,373.41, 386,907.87 and 257,803.57

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Solution

The fourth proportional to 280,373.41, 386,907.87 and 257,803.57 is: 355,762.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,373.41 : 386,907.87 = 257,803.57 : x
  2. Step 2: Convert to fraction form
    280,373.41/386,907.87 = 257,803.57/x
  3. Step 3: Cross multiply
    280,373.41x = 386,907.87 × 257,803.57
  4. Step 4: Simplify right side
    280,373.41x = 99,746,230,147.10
  5. Step 5: Solve for x
    x = 99,746,230,147.10/280,373.41
  6. Step 6: Final answer
    x = 355,762.09

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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.