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Finding the Fourth Proportional to 403,360.17, 555,436.49 and 394,409.40

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Solution

The fourth proportional to 403,360.17, 555,436.49 and 394,409.40 is: 543,111.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,360.17 : 555,436.49 = 394,409.40 : x
  2. Step 2: Convert to fraction form
    403,360.17/555,436.49 = 394,409.40/x
  3. Step 3: Cross multiply
    403,360.17x = 555,436.49 × 394,409.40
  4. Step 4: Simplify right side
    403,360.17x = 219,069,370,786.96
  5. Step 5: Solve for x
    x = 219,069,370,786.96/403,360.17
  6. Step 6: Final answer
    x = 543,111.06

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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.