Home / 2,155.63-2,972.41-1,455.79

Finding the Fourth Proportional to 2,155.63, 2,972.41 and 1,455.79

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Solution

The fourth proportional to 2,155.63, 2,972.41 and 1,455.79 is: 2,007.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.63 : 2,972.41 = 1,455.79 : x
  2. Step 2: Convert to fraction form
    2,155.63/2,972.41 = 1,455.79/x
  3. Step 3: Cross multiply
    2,155.63x = 2,972.41 × 1,455.79
  4. Step 4: Simplify right side
    2,155.63x = 4,327,204.75
  5. Step 5: Solve for x
    x = 4,327,204.75/2,155.63
  6. Step 6: Final answer
    x = 2,007.40

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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.