Home / 3,945.40-5,918.10-3,254.20

Finding the Fourth Proportional to 3,945.40, 5,918.10 and 3,254.20

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Solution

The fourth proportional to 3,945.40, 5,918.10 and 3,254.20 is: 4,881.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.40 : 5,918.10 = 3,254.20 : x
  2. Step 2: Convert to fraction form
    3,945.40/5,918.10 = 3,254.20/x
  3. Step 3: Cross multiply
    3,945.40x = 5,918.10 × 3,254.20
  4. Step 4: Simplify right side
    3,945.40x = 19,258,681.02
  5. Step 5: Solve for x
    x = 19,258,681.02/3,945.40
  6. Step 6: Final answer
    x = 4,881.30

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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.