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Finding the Fourth Proportional to 984.02, 1,475.48 and 435.92

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Solution

The fourth proportional to 984.02, 1,475.48 and 435.92 is: 653.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.02 : 1,475.48 = 435.92 : x
  2. Step 2: Convert to fraction form
    984.02/1,475.48 = 435.92/x
  3. Step 3: Cross multiply
    984.02x = 1,475.48 × 435.92
  4. Step 4: Simplify right side
    984.02x = 643,191.24
  5. Step 5: Solve for x
    x = 643,191.24/984.02
  6. Step 6: Final answer
    x = 653.64

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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.