Home / 1,405.10-2,108.36-675.29

Finding the Fourth Proportional to 1,405.10, 2,108.36 and 675.29

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Solution

The fourth proportional to 1,405.10, 2,108.36 and 675.29 is: 1,013.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.10 : 2,108.36 = 675.29 : x
  2. Step 2: Convert to fraction form
    1,405.10/2,108.36 = 675.29/x
  3. Step 3: Cross multiply
    1,405.10x = 2,108.36 × 675.29
  4. Step 4: Simplify right side
    1,405.10x = 1,423,754.42
  5. Step 5: Solve for x
    x = 1,423,754.42/1,405.10
  6. Step 6: Final answer
    x = 1,013.28

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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.