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Finding the Fourth Proportional to 855.58, 1,180.69 and 462.60

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Solution

The fourth proportional to 855.58, 1,180.69 and 462.60 is: 638.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.58 : 1,180.69 = 462.60 : x
  2. Step 2: Convert to fraction form
    855.58/1,180.69 = 462.60/x
  3. Step 3: Cross multiply
    855.58x = 1,180.69 × 462.60
  4. Step 4: Simplify right side
    855.58x = 546,188.64
  5. Step 5: Solve for x
    x = 546,188.64/855.58
  6. Step 6: Final answer
    x = 638.39

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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.