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Finding the Fourth Proportional to 642,529.80, 886,696.41 and 356,054.67

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Solution

The fourth proportional to 642,529.80, 886,696.41 and 356,054.67 is: 491,358.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,529.80 : 886,696.41 = 356,054.67 : x
  2. Step 2: Convert to fraction form
    642,529.80/886,696.41 = 356,054.67/x
  3. Step 3: Cross multiply
    642,529.80x = 886,696.41 × 356,054.67
  4. Step 4: Simplify right side
    642,529.80x = 315,712,399,869.48
  5. Step 5: Solve for x
    x = 315,712,399,869.48/642,529.80
  6. Step 6: Final answer
    x = 491,358.38

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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.