Home / 1,113.17-1,669.79-382.74

Finding the Fourth Proportional to 1,113.17, 1,669.79 and 382.74

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Solution

The fourth proportional to 1,113.17, 1,669.79 and 382.74 is: 574.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.17 : 1,669.79 = 382.74 : x
  2. Step 2: Convert to fraction form
    1,113.17/1,669.79 = 382.74/x
  3. Step 3: Cross multiply
    1,113.17x = 1,669.79 × 382.74
  4. Step 4: Simplify right side
    1,113.17x = 639,096.38
  5. Step 5: Solve for x
    x = 639,096.38/1,113.17
  6. Step 6: Final answer
    x = 574.12

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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.