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Finding the Fourth Proportional to 265,725.20, 399,048.60 and 187,389.20

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Solution

The fourth proportional to 265,725.20, 399,048.60 and 187,389.20 is: 281,408.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,725.20 : 399,048.60 = 187,389.20 : x
  2. Step 2: Convert to fraction form
    265,725.20/399,048.60 = 187,389.20/x
  3. Step 3: Cross multiply
    265,725.20x = 399,048.60 × 187,389.20
  4. Step 4: Simplify right side
    265,725.20x = 74,777,397,915.12
  5. Step 5: Solve for x
    x = 74,777,397,915.12/265,725.20
  6. Step 6: Final answer
    x = 281,408.76

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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.