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Finding the Fourth Proportional to 983.46, 1,475.36 and 325.49

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Solution

The fourth proportional to 983.46, 1,475.36 and 325.49 is: 488.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.46 : 1,475.36 = 325.49 : x
  2. Step 2: Convert to fraction form
    983.46/1,475.36 = 325.49/x
  3. Step 3: Cross multiply
    983.46x = 1,475.36 × 325.49
  4. Step 4: Simplify right side
    983.46x = 480,214.93
  5. Step 5: Solve for x
    x = 480,214.93/983.46
  6. Step 6: Final answer
    x = 488.29

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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.