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Finding the Fourth Proportional to 1,282.58, 1,925.09 and 666.73

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Solution

The fourth proportional to 1,282.58, 1,925.09 and 666.73 is: 1,000.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.58 : 1,925.09 = 666.73 : x
  2. Step 2: Convert to fraction form
    1,282.58/1,925.09 = 666.73/x
  3. Step 3: Cross multiply
    1,282.58x = 1,925.09 × 666.73
  4. Step 4: Simplify right side
    1,282.58x = 1,283,518.70
  5. Step 5: Solve for x
    x = 1,283,518.70/1,282.58
  6. Step 6: Final answer
    x = 1,000.73

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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.