Home / 1,115.24-1,673.30-345.80

Finding the Fourth Proportional to 1,115.24, 1,673.30 and 345.80

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Solution

The fourth proportional to 1,115.24, 1,673.30 and 345.80 is: 518.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.24 : 1,673.30 = 345.80 : x
  2. Step 2: Convert to fraction form
    1,115.24/1,673.30 = 345.80/x
  3. Step 3: Cross multiply
    1,115.24x = 1,673.30 × 345.80
  4. Step 4: Simplify right side
    1,115.24x = 578,627.14
  5. Step 5: Solve for x
    x = 578,627.14/1,115.24
  6. Step 6: Final answer
    x = 518.84

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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.