Home / 1,395.19-2,092.30-407.74

Finding the Fourth Proportional to 1,395.19, 2,092.30 and 407.74

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Solution

The fourth proportional to 1,395.19, 2,092.30 and 407.74 is: 611.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.19 : 2,092.30 = 407.74 : x
  2. Step 2: Convert to fraction form
    1,395.19/2,092.30 = 407.74/x
  3. Step 3: Cross multiply
    1,395.19x = 2,092.30 × 407.74
  4. Step 4: Simplify right side
    1,395.19x = 853,108.15
  5. Step 5: Solve for x
    x = 853,108.15/1,395.19
  6. Step 6: Final answer
    x = 611.46

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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.