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Finding the Fourth Proportional to 1,189.82, 1,784.82 and 324.13

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Solution

The fourth proportional to 1,189.82, 1,784.82 and 324.13 is: 486.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.82 : 1,784.82 = 324.13 : x
  2. Step 2: Convert to fraction form
    1,189.82/1,784.82 = 324.13/x
  3. Step 3: Cross multiply
    1,189.82x = 1,784.82 × 324.13
  4. Step 4: Simplify right side
    1,189.82x = 578,513.71
  5. Step 5: Solve for x
    x = 578,513.71/1,189.82
  6. Step 6: Final answer
    x = 486.22

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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.