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Finding the Fourth Proportional to 1,179.66, 1,627.65 and 885.63

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Solution

The fourth proportional to 1,179.66, 1,627.65 and 885.63 is: 1,221.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.66 : 1,627.65 = 885.63 : x
  2. Step 2: Convert to fraction form
    1,179.66/1,627.65 = 885.63/x
  3. Step 3: Cross multiply
    1,179.66x = 1,627.65 × 885.63
  4. Step 4: Simplify right side
    1,179.66x = 1,441,495.67
  5. Step 5: Solve for x
    x = 1,441,495.67/1,179.66
  6. Step 6: Final answer
    x = 1,221.96

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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.