Home / 1,623.20-2,240.15-960.21

Finding the Fourth Proportional to 1,623.20, 2,240.15 and 960.21

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Solution

The fourth proportional to 1,623.20, 2,240.15 and 960.21 is: 1,325.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,623.20 : 2,240.15 = 960.21 : x
  2. Step 2: Convert to fraction form
    1,623.20/2,240.15 = 960.21/x
  3. Step 3: Cross multiply
    1,623.20x = 2,240.15 × 960.21
  4. Step 4: Simplify right side
    1,623.20x = 2,151,009.63
  5. Step 5: Solve for x
    x = 2,151,009.63/1,623.20
  6. Step 6: Final answer
    x = 1,325.17

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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.