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Finding the Fourth Proportional to 528,711.97, 729,617.54 and 286,989.37

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Solution

The fourth proportional to 528,711.97, 729,617.54 and 286,989.37 is: 396,042.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,711.97 : 729,617.54 = 286,989.37 : x
  2. Step 2: Convert to fraction form
    528,711.97/729,617.54 = 286,989.37/x
  3. Step 3: Cross multiply
    528,711.97x = 729,617.54 × 286,989.37
  4. Step 4: Simplify right side
    528,711.97x = 209,392,478,145.55
  5. Step 5: Solve for x
    x = 209,392,478,145.55/528,711.97
  6. Step 6: Final answer
    x = 396,042.63

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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.