Home / 3,945.51-5,918.84-1,312.17

Finding the Fourth Proportional to 3,945.51, 5,918.84 and 1,312.17

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Solution

The fourth proportional to 3,945.51, 5,918.84 and 1,312.17 is: 1,968.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.51 : 5,918.84 = 1,312.17 : x
  2. Step 2: Convert to fraction form
    3,945.51/5,918.84 = 1,312.17/x
  3. Step 3: Cross multiply
    3,945.51x = 5,918.84 × 1,312.17
  4. Step 4: Simplify right side
    3,945.51x = 7,766,500.45
  5. Step 5: Solve for x
    x = 7,766,500.45/3,945.51
  6. Step 6: Final answer
    x = 1,968.44

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1.5x scale

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.