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Finding the Fourth Proportional to 1,871.69, 2,806.85 and 946.64

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Solution

The fourth proportional to 1,871.69, 2,806.85 and 946.64 is: 1,419.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,871.69 : 2,806.85 = 946.64 : x
  2. Step 2: Convert to fraction form
    1,871.69/2,806.85 = 946.64/x
  3. Step 3: Cross multiply
    1,871.69x = 2,806.85 × 946.64
  4. Step 4: Simplify right side
    1,871.69x = 2,657,085.87
  5. Step 5: Solve for x
    x = 2,657,085.87/1,871.69
  6. Step 6: Final answer
    x = 1,419.62

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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.