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Finding the Fourth Proportional to 2,379.03, 3,569.15 and 917.79

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Solution

The fourth proportional to 2,379.03, 3,569.15 and 917.79 is: 1,376.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,379.03 : 3,569.15 = 917.79 : x
  2. Step 2: Convert to fraction form
    2,379.03/3,569.15 = 917.79/x
  3. Step 3: Cross multiply
    2,379.03x = 3,569.15 × 917.79
  4. Step 4: Simplify right side
    2,379.03x = 3,275,730.18
  5. Step 5: Solve for x
    x = 3,275,730.18/2,379.03
  6. Step 6: Final answer
    x = 1,376.92

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1.5x scale

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.