Home / 1,878.51-2,815.05-1,381.01

Finding the Fourth Proportional to 1,878.51, 2,815.05 and 1,381.01

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Solution

The fourth proportional to 1,878.51, 2,815.05 and 1,381.01 is: 2,069.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,878.51 : 2,815.05 = 1,381.01 : x
  2. Step 2: Convert to fraction form
    1,878.51/2,815.05 = 1,381.01/x
  3. Step 3: Cross multiply
    1,878.51x = 2,815.05 × 1,381.01
  4. Step 4: Simplify right side
    1,878.51x = 3,887,598.13
  5. Step 5: Solve for x
    x = 3,887,598.13/1,878.51
  6. Step 6: Final answer
    x = 2,069.51

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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.