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Finding the Fourth Proportional to 528,662.12, 729,534.17 and 286,939.55

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Solution

The fourth proportional to 528,662.12, 729,534.17 and 286,939.55 is: 395,965.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,662.12 : 729,534.17 = 286,939.55 : x
  2. Step 2: Convert to fraction form
    528,662.12/729,534.17 = 286,939.55/x
  3. Step 3: Cross multiply
    528,662.12x = 729,534.17 × 286,939.55
  4. Step 4: Simplify right side
    528,662.12x = 209,332,201,367.06
  5. Step 5: Solve for x
    x = 209,332,201,367.06/528,662.12
  6. Step 6: Final answer
    x = 395,965.96

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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.