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Finding the Fourth Proportional to 984.96, 1,476.36 and 436.98

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Solution

The fourth proportional to 984.96, 1,476.36 and 436.98 is: 654.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.96 : 1,476.36 = 436.98 : x
  2. Step 2: Convert to fraction form
    984.96/1,476.36 = 436.98/x
  3. Step 3: Cross multiply
    984.96x = 1,476.36 × 436.98
  4. Step 4: Simplify right side
    984.96x = 645,139.79
  5. Step 5: Solve for x
    x = 645,139.79/984.96
  6. Step 6: Final answer
    x = 654.99

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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.