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Finding the Fourth Proportional to 428.10, 590.58 and 270.93

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Solution

The fourth proportional to 428.10, 590.58 and 270.93 is: 373.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.10 : 590.58 = 270.93 : x
  2. Step 2: Convert to fraction form
    428.10/590.58 = 270.93/x
  3. Step 3: Cross multiply
    428.10x = 590.58 × 270.93
  4. Step 4: Simplify right side
    428.10x = 160,005.84
  5. Step 5: Solve for x
    x = 160,005.84/428.10
  6. Step 6: Final answer
    x = 373.76

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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.