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Finding the Fourth Proportional to 2,937.17, 4,406.43 and 989.32

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Solution

The fourth proportional to 2,937.17, 4,406.43 and 989.32 is: 1,484.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,937.17 : 4,406.43 = 989.32 : x
  2. Step 2: Convert to fraction form
    2,937.17/4,406.43 = 989.32/x
  3. Step 3: Cross multiply
    2,937.17x = 4,406.43 × 989.32
  4. Step 4: Simplify right side
    2,937.17x = 4,359,369.33
  5. Step 5: Solve for x
    x = 4,359,369.33/2,937.17
  6. Step 6: Final answer
    x = 1,484.21

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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.