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Finding the Fourth Proportional to 3,312.98, 4,969.40 and 847.76

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Solution

The fourth proportional to 3,312.98, 4,969.40 and 847.76 is: 1,271.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,312.98 : 4,969.40 = 847.76 : x
  2. Step 2: Convert to fraction form
    3,312.98/4,969.40 = 847.76/x
  3. Step 3: Cross multiply
    3,312.98x = 4,969.40 × 847.76
  4. Step 4: Simplify right side
    3,312.98x = 4,212,858.54
  5. Step 5: Solve for x
    x = 4,212,858.54/3,312.98
  6. Step 6: Final answer
    x = 1,271.62

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1.5x scale

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.