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Finding the Fourth Proportional to 980.98, 1,471.70 and 322.99

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Solution

The fourth proportional to 980.98, 1,471.70 and 322.99 is: 484.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.98 : 1,471.70 = 322.99 : x
  2. Step 2: Convert to fraction form
    980.98/1,471.70 = 322.99/x
  3. Step 3: Cross multiply
    980.98x = 1,471.70 × 322.99
  4. Step 4: Simplify right side
    980.98x = 475,341.51
  5. Step 5: Solve for x
    x = 475,341.51/980.98
  6. Step 6: Final answer
    x = 484.56

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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.