Home / 1,619.32-2,234.28-1,121.80

Finding the Fourth Proportional to 1,619.32, 2,234.28 and 1,121.80

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Solution

The fourth proportional to 1,619.32, 2,234.28 and 1,121.80 is: 1,547.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.32 : 2,234.28 = 1,121.80 : x
  2. Step 2: Convert to fraction form
    1,619.32/2,234.28 = 1,121.80/x
  3. Step 3: Cross multiply
    1,619.32x = 2,234.28 × 1,121.80
  4. Step 4: Simplify right side
    1,619.32x = 2,506,415.30
  5. Step 5: Solve for x
    x = 2,506,415.30/1,619.32
  6. Step 6: Final answer
    x = 1,547.82

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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.