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Finding the Fourth Proportional to 984.98, 1,477.66 and 620.22

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Solution

The fourth proportional to 984.98, 1,477.66 and 620.22 is: 930.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.98 : 1,477.66 = 620.22 : x
  2. Step 2: Convert to fraction form
    984.98/1,477.66 = 620.22/x
  3. Step 3: Cross multiply
    984.98x = 1,477.66 × 620.22
  4. Step 4: Simplify right side
    984.98x = 916,474.29
  5. Step 5: Solve for x
    x = 916,474.29/984.98
  6. Step 6: Final answer
    x = 930.45

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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.