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Finding the Fourth Proportional to 1,293.05, 1,784.36 and 703.55

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Solution

The fourth proportional to 1,293.05, 1,784.36 and 703.55 is: 970.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.05 : 1,784.36 = 703.55 : x
  2. Step 2: Convert to fraction form
    1,293.05/1,784.36 = 703.55/x
  3. Step 3: Cross multiply
    1,293.05x = 1,784.36 × 703.55
  4. Step 4: Simplify right side
    1,293.05x = 1,255,382.96
  5. Step 5: Solve for x
    x = 1,255,382.96/1,293.05
  6. Step 6: Final answer
    x = 970.87

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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.