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Finding the Fourth Proportional to 984.10, 1,475.82 and 436.28

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Solution

The fourth proportional to 984.10, 1,475.82 and 436.28 is: 654.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.10 : 1,475.82 = 436.28 : x
  2. Step 2: Convert to fraction form
    984.10/1,475.82 = 436.28/x
  3. Step 3: Cross multiply
    984.10x = 1,475.82 × 436.28
  4. Step 4: Simplify right side
    984.10x = 643,870.75
  5. Step 5: Solve for x
    x = 643,870.75/984.10
  6. Step 6: Final answer
    x = 654.27

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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.