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Finding the Fourth Proportional to 528,286.48, 791,728.72 and 287,783.40

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Solution

The fourth proportional to 528,286.48, 791,728.72 and 287,783.40 is: 431,293.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,286.48 : 791,728.72 = 287,783.40 : x
  2. Step 2: Convert to fraction form
    528,286.48/791,728.72 = 287,783.40/x
  3. Step 3: Cross multiply
    528,286.48x = 791,728.72 × 287,783.40
  4. Step 4: Simplify right side
    528,286.48x = 227,846,382,919.25
  5. Step 5: Solve for x
    x = 227,846,382,919.25/528,286.48
  6. Step 6: Final answer
    x = 431,293.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.