Home / 1,985.61-2,740.21-1,199.51

Finding the Fourth Proportional to 1,985.61, 2,740.21 and 1,199.51

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Solution

The fourth proportional to 1,985.61, 2,740.21 and 1,199.51 is: 1,655.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.61 : 2,740.21 = 1,199.51 : x
  2. Step 2: Convert to fraction form
    1,985.61/2,740.21 = 1,199.51/x
  3. Step 3: Cross multiply
    1,985.61x = 2,740.21 × 1,199.51
  4. Step 4: Simplify right side
    1,985.61x = 3,286,895.60
  5. Step 5: Solve for x
    x = 3,286,895.60/1,985.61
  6. Step 6: Final answer
    x = 1,655.36

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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.