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Finding the Fourth Proportional to 989.47, 1,485.42 and 950.32

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Solution

The fourth proportional to 989.47, 1,485.42 and 950.32 is: 1,426.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.47 : 1,485.42 = 950.32 : x
  2. Step 2: Convert to fraction form
    989.47/1,485.42 = 950.32/x
  3. Step 3: Cross multiply
    989.47x = 1,485.42 × 950.32
  4. Step 4: Simplify right side
    989.47x = 1,411,624.33
  5. Step 5: Solve for x
    x = 1,411,624.33/989.47
  6. Step 6: Final answer
    x = 1,426.65

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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.