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Finding the Fourth Proportional to 528,040.44, 728,814.78 and 443,009.88

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Solution

The fourth proportional to 528,040.44, 728,814.78 and 443,009.88 is: 611,453.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,040.44 : 728,814.78 = 443,009.88 : x
  2. Step 2: Convert to fraction form
    528,040.44/728,814.78 = 443,009.88/x
  3. Step 3: Cross multiply
    528,040.44x = 728,814.78 × 443,009.88
  4. Step 4: Simplify right side
    528,040.44x = 322,872,148,230.03
  5. Step 5: Solve for x
    x = 322,872,148,230.03/528,040.44
  6. Step 6: Final answer
    x = 611,453.45

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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.