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Finding the Fourth Proportional to 393,216.80, 589,825.60 and 97,728.80

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Solution

The fourth proportional to 393,216.80, 589,825.60 and 97,728.80 is: 146,593.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,216.80 : 589,825.60 = 97,728.80 : x
  2. Step 2: Convert to fraction form
    393,216.80/589,825.60 = 97,728.80/x
  3. Step 3: Cross multiply
    393,216.80x = 589,825.60 × 97,728.80
  4. Step 4: Simplify right side
    393,216.80x = 57,642,948,097.28
  5. Step 5: Solve for x
    x = 57,642,948,097.28/393,216.80
  6. Step 6: Final answer
    x = 146,593.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.