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Finding the Fourth Proportional to 1,293.57, 1,784.84 and 1,084.59

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Solution

The fourth proportional to 1,293.57, 1,784.84 and 1,084.59 is: 1,496.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.57 : 1,784.84 = 1,084.59 : x
  2. Step 2: Convert to fraction form
    1,293.57/1,784.84 = 1,084.59/x
  3. Step 3: Cross multiply
    1,293.57x = 1,784.84 × 1,084.59
  4. Step 4: Simplify right side
    1,293.57x = 1,935,814.19
  5. Step 5: Solve for x
    x = 1,935,814.19/1,293.57
  6. Step 6: Final answer
    x = 1,496.49

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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.