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Finding the Fourth Proportional to 3,312.65, 4,969.16 and 847.49

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Solution

The fourth proportional to 3,312.65, 4,969.16 and 847.49 is: 1,271.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,312.65 : 4,969.16 = 847.49 : x
  2. Step 2: Convert to fraction form
    3,312.65/4,969.16 = 847.49/x
  3. Step 3: Cross multiply
    3,312.65x = 4,969.16 × 847.49
  4. Step 4: Simplify right side
    3,312.65x = 4,211,309.17
  5. Step 5: Solve for x
    x = 4,211,309.17/3,312.65
  6. Step 6: Final answer
    x = 1,271.28

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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.