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Finding the Fourth Proportional to 2,964.48, 4,447.20 and 912

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Solution

The fourth proportional to 2,964.48, 4,447.20 and 912 is: 1,368.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,964.48 : 4,447.20 = 912 : x
  2. Step 2: Convert to fraction form
    2,964.48/4,447.20 = 912/x
  3. Step 3: Cross multiply
    2,964.48x = 4,447.20 × 912
  4. Step 4: Simplify right side
    2,964.48x = 4,055,846.40
  5. Step 5: Solve for x
    x = 4,055,846.40/2,964.48
  6. Step 6: Final answer
    x = 1,368.15

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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.