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Finding the Fourth Proportional to 1,293.16, 1,784.34 and 851.80

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Solution

The fourth proportional to 1,293.16, 1,784.34 and 851.80 is: 1,175.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.16 : 1,784.34 = 851.80 : x
  2. Step 2: Convert to fraction form
    1,293.16/1,784.34 = 851.80/x
  3. Step 3: Cross multiply
    1,293.16x = 1,784.34 × 851.80
  4. Step 4: Simplify right side
    1,293.16x = 1,519,900.81
  5. Step 5: Solve for x
    x = 1,519,900.81/1,293.16
  6. Step 6: Final answer
    x = 1,175.34

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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.