Home / 2,145.60-2,959.68-1,445.76

Finding the Fourth Proportional to 2,145.60, 2,959.68 and 1,445.76

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Solution

The fourth proportional to 2,145.60, 2,959.68 and 1,445.76 is: 1,994.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.60 : 2,959.68 = 1,445.76 : x
  2. Step 2: Convert to fraction form
    2,145.60/2,959.68 = 1,445.76/x
  3. Step 3: Cross multiply
    2,145.60x = 2,959.68 × 1,445.76
  4. Step 4: Simplify right side
    2,145.60x = 4,278,986.96
  5. Step 5: Solve for x
    x = 4,278,986.96/2,145.60
  6. Step 6: Final answer
    x = 1,994.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.