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Finding the Fourth Proportional to 356.56, 533.40 and 305.28

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Solution

The fourth proportional to 356.56, 533.40 and 305.28 is: 456.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.56 : 533.40 = 305.28 : x
  2. Step 2: Convert to fraction form
    356.56/533.40 = 305.28/x
  3. Step 3: Cross multiply
    356.56x = 533.40 × 305.28
  4. Step 4: Simplify right side
    356.56x = 162,836.35
  5. Step 5: Solve for x
    x = 162,836.35/356.56
  6. Step 6: Final answer
    x = 456.69

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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.