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Finding the Fourth Proportional to 1,382.15, 1,907.37 and 792.74

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Solution

The fourth proportional to 1,382.15, 1,907.37 and 792.74 is: 1,093.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,382.15 : 1,907.37 = 792.74 : x
  2. Step 2: Convert to fraction form
    1,382.15/1,907.37 = 792.74/x
  3. Step 3: Cross multiply
    1,382.15x = 1,907.37 × 792.74
  4. Step 4: Simplify right side
    1,382.15x = 1,512,038.96
  5. Step 5: Solve for x
    x = 1,512,038.96/1,382.15
  6. Step 6: Final answer
    x = 1,093.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.