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Finding the Fourth Proportional to 1,293.11, 1,784.48 and 703.64

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Solution

The fourth proportional to 1,293.11, 1,784.48 and 703.64 is: 971.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.11 : 1,784.48 = 703.64 : x
  2. Step 2: Convert to fraction form
    1,293.11/1,784.48 = 703.64/x
  3. Step 3: Cross multiply
    1,293.11x = 1,784.48 × 703.64
  4. Step 4: Simplify right side
    1,293.11x = 1,255,619.07
  5. Step 5: Solve for x
    x = 1,255,619.07/1,293.11
  6. Step 6: Final answer
    x = 971.01

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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.