Home / 1,985.31-2,740.99-1,277.42

Finding the Fourth Proportional to 1,985.31, 2,740.99 and 1,277.42

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Solution

The fourth proportional to 1,985.31, 2,740.99 and 1,277.42 is: 1,763.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.31 : 2,740.99 = 1,277.42 : x
  2. Step 2: Convert to fraction form
    1,985.31/2,740.99 = 1,277.42/x
  3. Step 3: Cross multiply
    1,985.31x = 2,740.99 × 1,277.42
  4. Step 4: Simplify right side
    1,985.31x = 3,501,396.36
  5. Step 5: Solve for x
    x = 3,501,396.36/1,985.31
  6. Step 6: Final answer
    x = 1,763.65

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1.5x scale

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.