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Finding the Fourth Proportional to 642,353.39, 886,409.26 and 355,852.74

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Solution

The fourth proportional to 642,353.39, 886,409.26 and 355,852.74 is: 491,055.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,353.39 : 886,409.26 = 355,852.74 : x
  2. Step 2: Convert to fraction form
    642,353.39/886,409.26 = 355,852.74/x
  3. Step 3: Cross multiply
    642,353.39x = 886,409.26 × 355,852.74
  4. Step 4: Simplify right side
    642,353.39x = 315,431,162,153.11
  5. Step 5: Solve for x
    x = 315,431,162,153.11/642,353.39
  6. Step 6: Final answer
    x = 491,055.50

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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.