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Finding the Fourth Proportional to 421.08, 581.19 and 246.48

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Solution

The fourth proportional to 421.08, 581.19 and 246.48 is: 340.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.08 : 581.19 = 246.48 : x
  2. Step 2: Convert to fraction form
    421.08/581.19 = 246.48/x
  3. Step 3: Cross multiply
    421.08x = 581.19 × 246.48
  4. Step 4: Simplify right side
    421.08x = 143,251.71
  5. Step 5: Solve for x
    x = 143,251.71/421.08
  6. Step 6: Final answer
    x = 340.20

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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.