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Finding the Fourth Proportional to 384.78, 577.56 and 222.50

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Solution

The fourth proportional to 384.78, 577.56 and 222.50 is: 333.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.78 : 577.56 = 222.50 : x
  2. Step 2: Convert to fraction form
    384.78/577.56 = 222.50/x
  3. Step 3: Cross multiply
    384.78x = 577.56 × 222.50
  4. Step 4: Simplify right side
    384.78x = 128,507.10
  5. Step 5: Solve for x
    x = 128,507.10/384.78
  6. Step 6: Final answer
    x = 333.98

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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.