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Finding the Fourth Proportional to 767.86, 1,059.56 and 436.20

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Solution

The fourth proportional to 767.86, 1,059.56 and 436.20 is: 601.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.86 : 1,059.56 = 436.20 : x
  2. Step 2: Convert to fraction form
    767.86/1,059.56 = 436.20/x
  3. Step 3: Cross multiply
    767.86x = 1,059.56 × 436.20
  4. Step 4: Simplify right side
    767.86x = 462,180.07
  5. Step 5: Solve for x
    x = 462,180.07/767.86
  6. Step 6: Final answer
    x = 601.91

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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.