Home / 1,090.20-1,635.31-310.30

Finding the Fourth Proportional to 1,090.20, 1,635.31 and 310.30

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Solution

The fourth proportional to 1,090.20, 1,635.31 and 310.30 is: 465.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.20 : 1,635.31 = 310.30 : x
  2. Step 2: Convert to fraction form
    1,090.20/1,635.31 = 310.30/x
  3. Step 3: Cross multiply
    1,090.20x = 1,635.31 × 310.30
  4. Step 4: Simplify right side
    1,090.20x = 507,432.99
  5. Step 5: Solve for x
    x = 507,432.99/1,090.20
  6. Step 6: Final answer
    x = 465.45

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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.