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Finding the Fourth Proportional to 949.18, 1,422.60 and 486.58

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Solution

The fourth proportional to 949.18, 1,422.60 and 486.58 is: 729.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.18 : 1,422.60 = 486.58 : x
  2. Step 2: Convert to fraction form
    949.18/1,422.60 = 486.58/x
  3. Step 3: Cross multiply
    949.18x = 1,422.60 × 486.58
  4. Step 4: Simplify right side
    949.18x = 692,208.71
  5. Step 5: Solve for x
    x = 692,208.71/949.18
  6. Step 6: Final answer
    x = 729.27

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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.