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Finding the Fourth Proportional to 786.86, 1,179.56 and 324.36

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Solution

The fourth proportional to 786.86, 1,179.56 and 324.36 is: 486.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    786.86 : 1,179.56 = 324.36 : x
  2. Step 2: Convert to fraction form
    786.86/1,179.56 = 324.36/x
  3. Step 3: Cross multiply
    786.86x = 1,179.56 × 324.36
  4. Step 4: Simplify right side
    786.86x = 382,602.08
  5. Step 5: Solve for x
    x = 382,602.08/786.86
  6. Step 6: Final answer
    x = 486.24

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Double scale
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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.