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Finding the Fourth Proportional to 1,382.29, 1,907.54 and 792.81

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Solution

The fourth proportional to 1,382.29, 1,907.54 and 792.81 is: 1,094.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,382.29 : 1,907.54 = 792.81 : x
  2. Step 2: Convert to fraction form
    1,382.29/1,907.54 = 792.81/x
  3. Step 3: Cross multiply
    1,382.29x = 1,907.54 × 792.81
  4. Step 4: Simplify right side
    1,382.29x = 1,512,316.79
  5. Step 5: Solve for x
    x = 1,512,316.79/1,382.29
  6. Step 6: Final answer
    x = 1,094.07

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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.