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Finding the Fourth Proportional to 528,658.78, 729,529.57 and 286,936.16

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Solution

The fourth proportional to 528,658.78, 729,529.57 and 286,936.16 is: 395,961.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,658.78 : 729,529.57 = 286,936.16 : x
  2. Step 2: Convert to fraction form
    528,658.78/729,529.57 = 286,936.16/x
  3. Step 3: Cross multiply
    528,658.78x = 729,529.57 × 286,936.16
  4. Step 4: Simplify right side
    528,658.78x = 209,328,413,422.25
  5. Step 5: Solve for x
    x = 209,328,413,422.25/528,658.78
  6. Step 6: Final answer
    x = 395,961.29

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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.