Home / 1,643.09-2,267.51-979.92

Finding the Fourth Proportional to 1,643.09, 2,267.51 and 979.92

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Solution

The fourth proportional to 1,643.09, 2,267.51 and 979.92 is: 1,352.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.09 : 2,267.51 = 979.92 : x
  2. Step 2: Convert to fraction form
    1,643.09/2,267.51 = 979.92/x
  3. Step 3: Cross multiply
    1,643.09x = 2,267.51 × 979.92
  4. Step 4: Simplify right side
    1,643.09x = 2,221,973.50
  5. Step 5: Solve for x
    x = 2,221,973.50/1,643.09
  6. Step 6: Final answer
    x = 1,352.32

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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.