Home / 1,918.49-2,880.36-1,885.68

Finding the Fourth Proportional to 1,918.49, 2,880.36 and 1,885.68

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Solution

The fourth proportional to 1,918.49, 2,880.36 and 1,885.68 is: 2,831.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.49 : 2,880.36 = 1,885.68 : x
  2. Step 2: Convert to fraction form
    1,918.49/2,880.36 = 1,885.68/x
  3. Step 3: Cross multiply
    1,918.49x = 2,880.36 × 1,885.68
  4. Step 4: Simplify right side
    1,918.49x = 5,431,437.24
  5. Step 5: Solve for x
    x = 5,431,437.24/1,918.49
  6. Step 6: Final answer
    x = 2,831.11

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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.