Home / 1,811.23-2,501.56-1,220.74

Finding the Fourth Proportional to 1,811.23, 2,501.56 and 1,220.74

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Solution

The fourth proportional to 1,811.23, 2,501.56 and 1,220.74 is: 1,686.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.23 : 2,501.56 = 1,220.74 : x
  2. Step 2: Convert to fraction form
    1,811.23/2,501.56 = 1,220.74/x
  3. Step 3: Cross multiply
    1,811.23x = 2,501.56 × 1,220.74
  4. Step 4: Simplify right side
    1,811.23x = 3,053,754.35
  5. Step 5: Solve for x
    x = 3,053,754.35/1,811.23
  6. Step 6: Final answer
    x = 1,686.01

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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.