Home / 2,878.36-3,970.96-1,815.76

Finding the Fourth Proportional to 2,878.36, 3,970.96 and 1,815.76

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Solution

The fourth proportional to 2,878.36, 3,970.96 and 1,815.76 is: 2,505.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.36 : 3,970.96 = 1,815.76 : x
  2. Step 2: Convert to fraction form
    2,878.36/3,970.96 = 1,815.76/x
  3. Step 3: Cross multiply
    2,878.36x = 3,970.96 × 1,815.76
  4. Step 4: Simplify right side
    2,878.36x = 7,210,301.25
  5. Step 5: Solve for x
    x = 7,210,301.25/2,878.36
  6. Step 6: Final answer
    x = 2,505.00

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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.