Home / 2,871.18-3,955.23-1,985.45

Finding the Fourth Proportional to 2,871.18, 3,955.23 and 1,985.45

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Solution

The fourth proportional to 2,871.18, 3,955.23 and 1,985.45 is: 2,735.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,871.18 : 3,955.23 = 1,985.45 : x
  2. Step 2: Convert to fraction form
    2,871.18/3,955.23 = 1,985.45/x
  3. Step 3: Cross multiply
    2,871.18x = 3,955.23 × 1,985.45
  4. Step 4: Simplify right side
    2,871.18x = 7,852,891.63
  5. Step 5: Solve for x
    x = 7,852,891.63/2,871.18
  6. Step 6: Final answer
    x = 2,735.07

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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.