Home / 1,913.59-2,872.32-1,288.81

Finding the Fourth Proportional to 1,913.59, 2,872.32 and 1,288.81

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Solution

The fourth proportional to 1,913.59, 2,872.32 and 1,288.81 is: 1,934.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.59 : 2,872.32 = 1,288.81 : x
  2. Step 2: Convert to fraction form
    1,913.59/2,872.32 = 1,288.81/x
  3. Step 3: Cross multiply
    1,913.59x = 2,872.32 × 1,288.81
  4. Step 4: Simplify right side
    1,913.59x = 3,701,874.74
  5. Step 5: Solve for x
    x = 3,701,874.74/1,913.59
  6. Step 6: Final answer
    x = 1,934.52

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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.