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Finding the Fourth Proportional to 1,703.75, 2,556.60 and 923.75

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Solution

The fourth proportional to 1,703.75, 2,556.60 and 923.75 is: 1,386.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,703.75 : 2,556.60 = 923.75 : x
  2. Step 2: Convert to fraction form
    1,703.75/2,556.60 = 923.75/x
  3. Step 3: Cross multiply
    1,703.75x = 2,556.60 × 923.75
  4. Step 4: Simplify right side
    1,703.75x = 2,361,659.25
  5. Step 5: Solve for x
    x = 2,361,659.25/1,703.75
  6. Step 6: Final answer
    x = 1,386.15

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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.