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Finding the Fourth Proportional to 1,083, 1,624.30 and 389.56

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Solution

The fourth proportional to 1,083, 1,624.30 and 389.56 is: 584.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083 : 1,624.30 = 389.56 : x
  2. Step 2: Convert to fraction form
    1,083/1,624.30 = 389.56/x
  3. Step 3: Cross multiply
    1,083x = 1,624.30 × 389.56
  4. Step 4: Simplify right side
    1,083x = 632,762.31
  5. Step 5: Solve for x
    x = 632,762.31/1,083
  6. Step 6: Final answer
    x = 584.27

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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.