Home / 1,689.41-2,331.35-1,051.20

Finding the Fourth Proportional to 1,689.41, 2,331.35 and 1,051.20

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Solution

The fourth proportional to 1,689.41, 2,331.35 and 1,051.20 is: 1,450.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.41 : 2,331.35 = 1,051.20 : x
  2. Step 2: Convert to fraction form
    1,689.41/2,331.35 = 1,051.20/x
  3. Step 3: Cross multiply
    1,689.41x = 2,331.35 × 1,051.20
  4. Step 4: Simplify right side
    1,689.41x = 2,450,713.81
  5. Step 5: Solve for x
    x = 2,450,713.81/1,689.41
  6. Step 6: Final answer
    x = 1,450.63

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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.