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Finding the Fourth Proportional to 985.11, 1,477.73 and 326.96

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Solution

The fourth proportional to 985.11, 1,477.73 and 326.96 is: 490.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.11 : 1,477.73 = 326.96 : x
  2. Step 2: Convert to fraction form
    985.11/1,477.73 = 326.96/x
  3. Step 3: Cross multiply
    985.11x = 1,477.73 × 326.96
  4. Step 4: Simplify right side
    985.11x = 483,158.60
  5. Step 5: Solve for x
    x = 483,158.60/985.11
  6. Step 6: Final answer
    x = 490.46

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1.5x scale

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.