Home / 1,621.13-2,237.16-885.13

Finding the Fourth Proportional to 1,621.13, 2,237.16 and 885.13

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Solution

The fourth proportional to 1,621.13, 2,237.16 and 885.13 is: 1,221.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.13 : 2,237.16 = 885.13 : x
  2. Step 2: Convert to fraction form
    1,621.13/2,237.16 = 885.13/x
  3. Step 3: Cross multiply
    1,621.13x = 2,237.16 × 885.13
  4. Step 4: Simplify right side
    1,621.13x = 1,980,177.43
  5. Step 5: Solve for x
    x = 1,980,177.43/1,621.13
  6. Step 6: Final answer
    x = 1,221.48

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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.