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Finding the Fourth Proportional to 1,083.91, 1,623.26 and 620.28

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Solution

The fourth proportional to 1,083.91, 1,623.26 and 620.28 is: 928.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.91 : 1,623.26 = 620.28 : x
  2. Step 2: Convert to fraction form
    1,083.91/1,623.26 = 620.28/x
  3. Step 3: Cross multiply
    1,083.91x = 1,623.26 × 620.28
  4. Step 4: Simplify right side
    1,083.91x = 1,006,875.71
  5. Step 5: Solve for x
    x = 1,006,875.71/1,083.91
  6. Step 6: Final answer
    x = 928.93

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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.