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Finding the Fourth Proportional to 984.60, 1,477.26 and 436.41

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Solution

The fourth proportional to 984.60, 1,477.26 and 436.41 is: 654.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.60 : 1,477.26 = 436.41 : x
  2. Step 2: Convert to fraction form
    984.60/1,477.26 = 436.41/x
  3. Step 3: Cross multiply
    984.60x = 1,477.26 × 436.41
  4. Step 4: Simplify right side
    984.60x = 644,691.04
  5. Step 5: Solve for x
    x = 644,691.04/984.60
  6. Step 6: Final answer
    x = 654.77

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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.