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Finding the Fourth Proportional to 428.76, 590.90 and 304.43

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Solution

The fourth proportional to 428.76, 590.90 and 304.43 is: 419.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.76 : 590.90 = 304.43 : x
  2. Step 2: Convert to fraction form
    428.76/590.90 = 304.43/x
  3. Step 3: Cross multiply
    428.76x = 590.90 × 304.43
  4. Step 4: Simplify right side
    428.76x = 179,883.21
  5. Step 5: Solve for x
    x = 179,883.21/428.76
  6. Step 6: Final answer
    x = 419.54

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Find fourth proportional to 214.38, 295.45 and 152.21
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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.