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Finding the Fourth Proportional to 1,083.30, 1,624.02 and 919.86

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Solution

The fourth proportional to 1,083.30, 1,624.02 and 919.86 is: 1,379.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.30 : 1,624.02 = 919.86 : x
  2. Step 2: Convert to fraction form
    1,083.30/1,624.02 = 919.86/x
  3. Step 3: Cross multiply
    1,083.30x = 1,624.02 × 919.86
  4. Step 4: Simplify right side
    1,083.30x = 1,493,871.04
  5. Step 5: Solve for x
    x = 1,493,871.04/1,083.30
  6. Step 6: Final answer
    x = 1,379.00

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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.