Home / 1,620.32-2,428.60-927.31

Finding the Fourth Proportional to 1,620.32, 2,428.60 and 927.31

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Solution

The fourth proportional to 1,620.32, 2,428.60 and 927.31 is: 1,389.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.32 : 2,428.60 = 927.31 : x
  2. Step 2: Convert to fraction form
    1,620.32/2,428.60 = 927.31/x
  3. Step 3: Cross multiply
    1,620.32x = 2,428.60 × 927.31
  4. Step 4: Simplify right side
    1,620.32x = 2,252,062.47
  5. Step 5: Solve for x
    x = 2,252,062.47/1,620.32
  6. Step 6: Final answer
    x = 1,389.89

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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.