Home / 1,689.06-2,329.35-1,129.26

Finding the Fourth Proportional to 1,689.06, 2,329.35 and 1,129.26

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Solution

The fourth proportional to 1,689.06, 2,329.35 and 1,129.26 is: 1,557.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.06 : 2,329.35 = 1,129.26 : x
  2. Step 2: Convert to fraction form
    1,689.06/2,329.35 = 1,129.26/x
  3. Step 3: Cross multiply
    1,689.06x = 2,329.35 × 1,129.26
  4. Step 4: Simplify right side
    1,689.06x = 2,630,441.78
  5. Step 5: Solve for x
    x = 2,630,441.78/1,689.06
  6. Step 6: Final answer
    x = 1,557.34

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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.