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Finding the Fourth Proportional to 980.79, 1,470.68 and 364.49

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Solution

The fourth proportional to 980.79, 1,470.68 and 364.49 is: 546.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.79 : 1,470.68 = 364.49 : x
  2. Step 2: Convert to fraction form
    980.79/1,470.68 = 364.49/x
  3. Step 3: Cross multiply
    980.79x = 1,470.68 × 364.49
  4. Step 4: Simplify right side
    980.79x = 536,038.98
  5. Step 5: Solve for x
    x = 536,038.98/980.79
  6. Step 6: Final answer
    x = 546.54

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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.