Home / 1,965.40-2,948.64-1,555.90

Finding the Fourth Proportional to 1,965.40, 2,948.64 and 1,555.90

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Solution

The fourth proportional to 1,965.40, 2,948.64 and 1,555.90 is: 2,334.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965.40 : 2,948.64 = 1,555.90 : x
  2. Step 2: Convert to fraction form
    1,965.40/2,948.64 = 1,555.90/x
  3. Step 3: Cross multiply
    1,965.40x = 2,948.64 × 1,555.90
  4. Step 4: Simplify right side
    1,965.40x = 4,587,788.98
  5. Step 5: Solve for x
    x = 4,587,788.98/1,965.40
  6. Step 6: Final answer
    x = 2,334.28

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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.