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Finding the Fourth Proportional to 1,189.52, 1,784.15 and 409.49

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Solution

The fourth proportional to 1,189.52, 1,784.15 and 409.49 is: 614.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.52 : 1,784.15 = 409.49 : x
  2. Step 2: Convert to fraction form
    1,189.52/1,784.15 = 409.49/x
  3. Step 3: Cross multiply
    1,189.52x = 1,784.15 × 409.49
  4. Step 4: Simplify right side
    1,189.52x = 730,597.52
  5. Step 5: Solve for x
    x = 730,597.52/1,189.52
  6. Step 6: Final answer
    x = 614.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.