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Finding the Fourth Proportional to 2,696.64, 4,045.25 and 847.81

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Solution

The fourth proportional to 2,696.64, 4,045.25 and 847.81 is: 1,271.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,696.64 : 4,045.25 = 847.81 : x
  2. Step 2: Convert to fraction form
    2,696.64/4,045.25 = 847.81/x
  3. Step 3: Cross multiply
    2,696.64x = 4,045.25 × 847.81
  4. Step 4: Simplify right side
    2,696.64x = 3,429,603.40
  5. Step 5: Solve for x
    x = 3,429,603.40/2,696.64
  6. Step 6: Final answer
    x = 1,271.81

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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.