Home / 1,689.09-2,328.83-1,291.24

Finding the Fourth Proportional to 1,689.09, 2,328.83 and 1,291.24

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Solution

The fourth proportional to 1,689.09, 2,328.83 and 1,291.24 is: 1,780.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.09 : 2,328.83 = 1,291.24 : x
  2. Step 2: Convert to fraction form
    1,689.09/2,328.83 = 1,291.24/x
  3. Step 3: Cross multiply
    1,689.09x = 2,328.83 × 1,291.24
  4. Step 4: Simplify right side
    1,689.09x = 3,007,071.99
  5. Step 5: Solve for x
    x = 3,007,071.99/1,689.09
  6. Step 6: Final answer
    x = 1,780.30

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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.