Home / 1,988.93-2,744.81-1,399.66

Finding the Fourth Proportional to 1,988.93, 2,744.81 and 1,399.66

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Solution

The fourth proportional to 1,988.93, 2,744.81 and 1,399.66 is: 1,931.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.93 : 2,744.81 = 1,399.66 : x
  2. Step 2: Convert to fraction form
    1,988.93/2,744.81 = 1,399.66/x
  3. Step 3: Cross multiply
    1,988.93x = 2,744.81 × 1,399.66
  4. Step 4: Simplify right side
    1,988.93x = 3,841,800.76
  5. Step 5: Solve for x
    x = 3,841,800.76/1,988.93
  6. Step 6: Final answer
    x = 1,931.59

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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.