Home / 1,553.16-2,143.38-890.07

Finding the Fourth Proportional to 1,553.16, 2,143.38 and 890.07

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Solution

The fourth proportional to 1,553.16, 2,143.38 and 890.07 is: 1,228.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.16 : 2,143.38 = 890.07 : x
  2. Step 2: Convert to fraction form
    1,553.16/2,143.38 = 890.07/x
  3. Step 3: Cross multiply
    1,553.16x = 2,143.38 × 890.07
  4. Step 4: Simplify right side
    1,553.16x = 1,907,758.24
  5. Step 5: Solve for x
    x = 1,907,758.24/1,553.16
  6. Step 6: Final answer
    x = 1,228.31

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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.