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Finding the Fourth Proportional to 258,621.89, 356,894.78 and 145,444.64

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Solution

The fourth proportional to 258,621.89, 356,894.78 and 145,444.64 is: 200,711.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,621.89 : 356,894.78 = 145,444.64 : x
  2. Step 2: Convert to fraction form
    258,621.89/356,894.78 = 145,444.64/x
  3. Step 3: Cross multiply
    258,621.89x = 356,894.78 × 145,444.64
  4. Step 4: Simplify right side
    258,621.89x = 51,908,430,283.28
  5. Step 5: Solve for x
    x = 51,908,430,283.28/258,621.89
  6. Step 6: Final answer
    x = 200,711.67

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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.