Home / 1,112.90-1,669.20-382.46

Finding the Fourth Proportional to 1,112.90, 1,669.20 and 382.46

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Solution

The fourth proportional to 1,112.90, 1,669.20 and 382.46 is: 573.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.90 : 1,669.20 = 382.46 : x
  2. Step 2: Convert to fraction form
    1,112.90/1,669.20 = 382.46/x
  3. Step 3: Cross multiply
    1,112.90x = 1,669.20 × 382.46
  4. Step 4: Simplify right side
    1,112.90x = 638,402.23
  5. Step 5: Solve for x
    x = 638,402.23/1,112.90
  6. Step 6: Final answer
    x = 573.64

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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.