Home / 1,965.12-2,931.42-1,636.80

Finding the Fourth Proportional to 1,965.12, 2,931.42 and 1,636.80

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Solution

The fourth proportional to 1,965.12, 2,931.42 and 1,636.80 is: 2,441.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965.12 : 2,931.42 = 1,636.80 : x
  2. Step 2: Convert to fraction form
    1,965.12/2,931.42 = 1,636.80/x
  3. Step 3: Cross multiply
    1,965.12x = 2,931.42 × 1,636.80
  4. Step 4: Simplify right side
    1,965.12x = 4,798,148.26
  5. Step 5: Solve for x
    x = 4,798,148.26/1,965.12
  6. Step 6: Final answer
    x = 2,441.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.