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Finding the Fourth Proportional to 285,072.54, 393,408.28 and 157,759.98

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Solution

The fourth proportional to 285,072.54, 393,408.28 and 157,759.98 is: 217,713.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,072.54 : 393,408.28 = 157,759.98 : x
  2. Step 2: Convert to fraction form
    285,072.54/393,408.28 = 157,759.98/x
  3. Step 3: Cross multiply
    285,072.54x = 393,408.28 × 157,759.98
  4. Step 4: Simplify right side
    285,072.54x = 62,064,082,384.63
  5. Step 5: Solve for x
    x = 62,064,082,384.63/285,072.54
  6. Step 6: Final answer
    x = 217,713.30

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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.