Home / 1,918.14-2,645.40-1,545

Finding the Fourth Proportional to 1,918.14, 2,645.40 and 1,545

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Solution

The fourth proportional to 1,918.14, 2,645.40 and 1,545 is: 2,130.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.14 : 2,645.40 = 1,545 : x
  2. Step 2: Convert to fraction form
    1,918.14/2,645.40 = 1,545/x
  3. Step 3: Cross multiply
    1,918.14x = 2,645.40 × 1,545
  4. Step 4: Simplify right side
    1,918.14x = 4,087,143
  5. Step 5: Solve for x
    x = 4,087,143/1,918.14
  6. Step 6: Final answer
    x = 2,130.78

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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.