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Finding the Fourth Proportional to 767.66, 1,059.34 and 418.36

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Solution

The fourth proportional to 767.66, 1,059.34 and 418.36 is: 577.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.66 : 1,059.34 = 418.36 : x
  2. Step 2: Convert to fraction form
    767.66/1,059.34 = 418.36/x
  3. Step 3: Cross multiply
    767.66x = 1,059.34 × 418.36
  4. Step 4: Simplify right side
    767.66x = 443,185.48
  5. Step 5: Solve for x
    x = 443,185.48/767.66
  6. Step 6: Final answer
    x = 577.32

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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.