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Finding the Fourth Proportional to 980.63, 1,470.63 and 541.71

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Solution

The fourth proportional to 980.63, 1,470.63 and 541.71 is: 812.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.63 : 1,470.63 = 541.71 : x
  2. Step 2: Convert to fraction form
    980.63/1,470.63 = 541.71/x
  3. Step 3: Cross multiply
    980.63x = 1,470.63 × 541.71
  4. Step 4: Simplify right side
    980.63x = 796,654.98
  5. Step 5: Solve for x
    x = 796,654.98/980.63
  6. Step 6: Final answer
    x = 812.40

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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.