Home / 1,985.80-2,994.68-1,972.84

Finding the Fourth Proportional to 1,985.80, 2,994.68 and 1,972.84

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Solution

The fourth proportional to 1,985.80, 2,994.68 and 1,972.84 is: 2,975.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.80 : 2,994.68 = 1,972.84 : x
  2. Step 2: Convert to fraction form
    1,985.80/2,994.68 = 1,972.84/x
  3. Step 3: Cross multiply
    1,985.80x = 2,994.68 × 1,972.84
  4. Step 4: Simplify right side
    1,985.80x = 5,908,024.49
  5. Step 5: Solve for x
    x = 5,908,024.49/1,985.80
  6. Step 6: Final answer
    x = 2,975.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.