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Finding the Fourth Proportional to 660,566.33, 911,583.30 and 388,644.47

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Solution

The fourth proportional to 660,566.33, 911,583.30 and 388,644.47 is: 536,330.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,566.33 : 911,583.30 = 388,644.47 : x
  2. Step 2: Convert to fraction form
    660,566.33/911,583.30 = 388,644.47/x
  3. Step 3: Cross multiply
    660,566.33x = 911,583.30 × 388,644.47
  4. Step 4: Simplify right side
    660,566.33x = 354,281,808,489.35
  5. Step 5: Solve for x
    x = 354,281,808,489.35/660,566.33
  6. Step 6: Final answer
    x = 536,330.41

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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.