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Finding the Fourth Proportional to 481,915.31, 665,020.31 and 288,429.63

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Solution

The fourth proportional to 481,915.31, 665,020.31 and 288,429.63 is: 398,019.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,915.31 : 665,020.31 = 288,429.63 : x
  2. Step 2: Convert to fraction form
    481,915.31/665,020.31 = 288,429.63/x
  3. Step 3: Cross multiply
    481,915.31x = 665,020.31 × 288,429.63
  4. Step 4: Simplify right side
    481,915.31x = 191,811,561,955.79
  5. Step 5: Solve for x
    x = 191,811,561,955.79/481,915.31
  6. Step 6: Final answer
    x = 398,019.23

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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.