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Finding the Fourth Proportional to 767.80, 1,059.46 and 453.08

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Solution

The fourth proportional to 767.80, 1,059.46 and 453.08 is: 625.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.80 : 1,059.46 = 453.08 : x
  2. Step 2: Convert to fraction form
    767.80/1,059.46 = 453.08/x
  3. Step 3: Cross multiply
    767.80x = 1,059.46 × 453.08
  4. Step 4: Simplify right side
    767.80x = 480,014.58
  5. Step 5: Solve for x
    x = 480,014.58/767.80
  6. Step 6: Final answer
    x = 625.18

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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.