Home / 1,556.12-2,147.30-917.96

Finding the Fourth Proportional to 1,556.12, 2,147.30 and 917.96

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Solution

The fourth proportional to 1,556.12, 2,147.30 and 917.96 is: 1,266.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.12 : 2,147.30 = 917.96 : x
  2. Step 2: Convert to fraction form
    1,556.12/2,147.30 = 917.96/x
  3. Step 3: Cross multiply
    1,556.12x = 2,147.30 × 917.96
  4. Step 4: Simplify right side
    1,556.12x = 1,971,135.51
  5. Step 5: Solve for x
    x = 1,971,135.51/1,556.12
  6. Step 6: Final answer
    x = 1,266.70

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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.