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Finding the Fourth Proportional to 1,293.28, 1,784.69 and 703.80

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Solution

The fourth proportional to 1,293.28, 1,784.69 and 703.80 is: 971.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.28 : 1,784.69 = 703.80 : x
  2. Step 2: Convert to fraction form
    1,293.28/1,784.69 = 703.80/x
  3. Step 3: Cross multiply
    1,293.28x = 1,784.69 × 703.80
  4. Step 4: Simplify right side
    1,293.28x = 1,256,063.94
  5. Step 5: Solve for x
    x = 1,256,063.94/1,293.28
  6. Step 6: Final answer
    x = 971.23

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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.