Home / 1,989.93-2,740.50-1,946.88

Finding the Fourth Proportional to 1,989.93, 2,740.50 and 1,946.88

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Solution

The fourth proportional to 1,989.93, 2,740.50 and 1,946.88 is: 2,681.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.93 : 2,740.50 = 1,946.88 : x
  2. Step 2: Convert to fraction form
    1,989.93/2,740.50 = 1,946.88/x
  3. Step 3: Cross multiply
    1,989.93x = 2,740.50 × 1,946.88
  4. Step 4: Simplify right side
    1,989.93x = 5,335,424.64
  5. Step 5: Solve for x
    x = 5,335,424.64/1,989.93
  6. Step 6: Final answer
    x = 2,681.21

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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.