Home / 1,031.28-1,412.46-1,005.36

Finding the Fourth Proportional to 1,031.28, 1,412.46 and 1,005.36

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Solution

The fourth proportional to 1,031.28, 1,412.46 and 1,005.36 is: 1,376.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.28 : 1,412.46 = 1,005.36 : x
  2. Step 2: Convert to fraction form
    1,031.28/1,412.46 = 1,005.36/x
  3. Step 3: Cross multiply
    1,031.28x = 1,412.46 × 1,005.36
  4. Step 4: Simplify right side
    1,031.28x = 1,420,030.79
  5. Step 5: Solve for x
    x = 1,420,030.79/1,031.28
  6. Step 6: Final answer
    x = 1,376.96

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.