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Finding the Fourth Proportional to 448,643.91, 619,224.41 and 257,762.55

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Solution

The fourth proportional to 448,643.91, 619,224.41 and 257,762.55 is: 355,767.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,643.91 : 619,224.41 = 257,762.55 : x
  2. Step 2: Convert to fraction form
    448,643.91/619,224.41 = 257,762.55/x
  3. Step 3: Cross multiply
    448,643.91x = 619,224.41 × 257,762.55
  4. Step 4: Simplify right side
    448,643.91x = 159,612,862,943.85
  5. Step 5: Solve for x
    x = 159,612,862,943.85/448,643.91
  6. Step 6: Final answer
    x = 355,767.37

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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.