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Finding the Fourth Proportional to 1,705.62, 2,556.30 and 730.59

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Solution

The fourth proportional to 1,705.62, 2,556.30 and 730.59 is: 1,094.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,705.62 : 2,556.30 = 730.59 : x
  2. Step 2: Convert to fraction form
    1,705.62/2,556.30 = 730.59/x
  3. Step 3: Cross multiply
    1,705.62x = 2,556.30 × 730.59
  4. Step 4: Simplify right side
    1,705.62x = 1,867,607.22
  5. Step 5: Solve for x
    x = 1,867,607.22/1,705.62
  6. Step 6: Final answer
    x = 1,094.97

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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.