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Finding the Fourth Proportional to 1,965.57, 2,946.98 and 869.33

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Solution

The fourth proportional to 1,965.57, 2,946.98 and 869.33 is: 1,303.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965.57 : 2,946.98 = 869.33 : x
  2. Step 2: Convert to fraction form
    1,965.57/2,946.98 = 869.33/x
  3. Step 3: Cross multiply
    1,965.57x = 2,946.98 × 869.33
  4. Step 4: Simplify right side
    1,965.57x = 2,561,907.66
  5. Step 5: Solve for x
    x = 2,561,907.66/1,965.57
  6. Step 6: Final answer
    x = 1,303.39

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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.