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Finding the Fourth Proportional to 1,293.38, 1,784.81 and 703.92

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Solution

The fourth proportional to 1,293.38, 1,784.81 and 703.92 is: 971.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.38 : 1,784.81 = 703.92 : x
  2. Step 2: Convert to fraction form
    1,293.38/1,784.81 = 703.92/x
  3. Step 3: Cross multiply
    1,293.38x = 1,784.81 × 703.92
  4. Step 4: Simplify right side
    1,293.38x = 1,256,365.22
  5. Step 5: Solve for x
    x = 1,256,365.22/1,293.38
  6. Step 6: Final answer
    x = 971.38

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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.