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Finding the Fourth Proportional to 678,615.24, 936,563.88 and 388,253.70

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Solution

The fourth proportional to 678,615.24, 936,563.88 and 388,253.70 is: 535,832.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,615.24 : 936,563.88 = 388,253.70 : x
  2. Step 2: Convert to fraction form
    678,615.24/936,563.88 = 388,253.70/x
  3. Step 3: Cross multiply
    678,615.24x = 936,563.88 × 388,253.70
  4. Step 4: Simplify right side
    678,615.24x = 363,624,391,696.36
  5. Step 5: Solve for x
    x = 363,624,391,696.36/678,615.24
  6. Step 6: Final answer
    x = 535,832.93

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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.