Home / 1,159.06-1,738.56-428.62

Finding the Fourth Proportional to 1,159.06, 1,738.56 and 428.62

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Solution

The fourth proportional to 1,159.06, 1,738.56 and 428.62 is: 642.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.06 : 1,738.56 = 428.62 : x
  2. Step 2: Convert to fraction form
    1,159.06/1,738.56 = 428.62/x
  3. Step 3: Cross multiply
    1,159.06x = 1,738.56 × 428.62
  4. Step 4: Simplify right side
    1,159.06x = 745,181.59
  5. Step 5: Solve for x
    x = 745,181.59/1,159.06
  6. Step 6: Final answer
    x = 642.92

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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.