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Finding the Fourth Proportional to 528,644.89, 729,530.75 and 286,927.55

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Solution

The fourth proportional to 528,644.89, 729,530.75 and 286,927.55 is: 395,960.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,644.89 : 729,530.75 = 286,927.55 : x
  2. Step 2: Convert to fraction form
    528,644.89/729,530.75 = 286,927.55/x
  3. Step 3: Cross multiply
    528,644.89x = 729,530.75 × 286,927.55
  4. Step 4: Simplify right side
    528,644.89x = 209,322,465,664.87
  5. Step 5: Solve for x
    x = 209,322,465,664.87/528,644.89
  6. Step 6: Final answer
    x = 395,960.45

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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.