Home / 1,917.64-2,646.32-1,131.68

Finding the Fourth Proportional to 1,917.64, 2,646.32 and 1,131.68

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Solution

The fourth proportional to 1,917.64, 2,646.32 and 1,131.68 is: 1,561.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.64 : 2,646.32 = 1,131.68 : x
  2. Step 2: Convert to fraction form
    1,917.64/2,646.32 = 1,131.68/x
  3. Step 3: Cross multiply
    1,917.64x = 2,646.32 × 1,131.68
  4. Step 4: Simplify right side
    1,917.64x = 2,994,787.42
  5. Step 5: Solve for x
    x = 2,994,787.42/1,917.64
  6. Step 6: Final answer
    x = 1,561.70

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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.