Home / 3,909.40-5,864.16-1,312.36

Finding the Fourth Proportional to 3,909.40, 5,864.16 and 1,312.36

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Solution

The fourth proportional to 3,909.40, 5,864.16 and 1,312.36 is: 1,968.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.40 : 5,864.16 = 1,312.36 : x
  2. Step 2: Convert to fraction form
    3,909.40/5,864.16 = 1,312.36/x
  3. Step 3: Cross multiply
    3,909.40x = 5,864.16 × 1,312.36
  4. Step 4: Simplify right side
    3,909.40x = 7,695,889.02
  5. Step 5: Solve for x
    x = 7,695,889.02/3,909.40
  6. Step 6: Final answer
    x = 1,968.56

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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.