Home / 2,781.80-4,172.65-1,116.35

Finding the Fourth Proportional to 2,781.80, 4,172.65 and 1,116.35

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Solution

The fourth proportional to 2,781.80, 4,172.65 and 1,116.35 is: 1,674.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.80 : 4,172.65 = 1,116.35 : x
  2. Step 2: Convert to fraction form
    2,781.80/4,172.65 = 1,116.35/x
  3. Step 3: Cross multiply
    2,781.80x = 4,172.65 × 1,116.35
  4. Step 4: Simplify right side
    2,781.80x = 4,658,118.23
  5. Step 5: Solve for x
    x = 4,658,118.23/2,781.80
  6. Step 6: Final answer
    x = 1,674.50

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1.5x scale

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.