Home / 1,623.56-2,431.45-928.12

Finding the Fourth Proportional to 1,623.56, 2,431.45 and 928.12

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Solution

The fourth proportional to 1,623.56, 2,431.45 and 928.12 is: 1,389.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,623.56 : 2,431.45 = 928.12 : x
  2. Step 2: Convert to fraction form
    1,623.56/2,431.45 = 928.12/x
  3. Step 3: Cross multiply
    1,623.56x = 2,431.45 × 928.12
  4. Step 4: Simplify right side
    1,623.56x = 2,256,677.37
  5. Step 5: Solve for x
    x = 2,256,677.37/1,623.56
  6. Step 6: Final answer
    x = 1,389.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.