Home / 1,988.99-2,743.54-1,281.75

Finding the Fourth Proportional to 1,988.99, 2,743.54 and 1,281.75

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Solution

The fourth proportional to 1,988.99, 2,743.54 and 1,281.75 is: 1,768.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.99 : 2,743.54 = 1,281.75 : x
  2. Step 2: Convert to fraction form
    1,988.99/2,743.54 = 1,281.75/x
  3. Step 3: Cross multiply
    1,988.99x = 2,743.54 × 1,281.75
  4. Step 4: Simplify right side
    1,988.99x = 3,516,532.40
  5. Step 5: Solve for x
    x = 3,516,532.40/1,988.99
  6. Step 6: Final answer
    x = 1,768.00

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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.