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Finding the Fourth Proportional to 984.34, 1,475.43 and 436.11

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Solution

The fourth proportional to 984.34, 1,475.43 and 436.11 is: 653.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.34 : 1,475.43 = 436.11 : x
  2. Step 2: Convert to fraction form
    984.34/1,475.43 = 436.11/x
  3. Step 3: Cross multiply
    984.34x = 1,475.43 × 436.11
  4. Step 4: Simplify right side
    984.34x = 643,449.78
  5. Step 5: Solve for x
    x = 643,449.78/984.34
  6. Step 6: Final answer
    x = 653.69

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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.