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Finding the Fourth Proportional to 660,558.33, 911,572.25 and 388,636.47

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Solution

The fourth proportional to 660,558.33, 911,572.25 and 388,636.47 is: 536,319.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,558.33 : 911,572.25 = 388,636.47 : x
  2. Step 2: Convert to fraction form
    660,558.33/911,572.25 = 388,636.47/x
  3. Step 3: Cross multiply
    660,558.33x = 911,572.25 × 388,636.47
  4. Step 4: Simplify right side
    660,558.33x = 354,270,219,446.78
  5. Step 5: Solve for x
    x = 354,270,219,446.78/660,558.33
  6. Step 6: Final answer
    x = 536,319.36

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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.