Home / 1,621.81-2,238.65-1,125.12

Finding the Fourth Proportional to 1,621.81, 2,238.65 and 1,125.12

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Solution

The fourth proportional to 1,621.81, 2,238.65 and 1,125.12 is: 1,553.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.81 : 2,238.65 = 1,125.12 : x
  2. Step 2: Convert to fraction form
    1,621.81/2,238.65 = 1,125.12/x
  3. Step 3: Cross multiply
    1,621.81x = 2,238.65 × 1,125.12
  4. Step 4: Simplify right side
    1,621.81x = 2,518,749.89
  5. Step 5: Solve for x
    x = 2,518,749.89/1,621.81
  6. Step 6: Final answer
    x = 1,553.05

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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.