Home / 1,159.17-1,738.58-428.59

Finding the Fourth Proportional to 1,159.17, 1,738.58 and 428.59

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Solution

The fourth proportional to 1,159.17, 1,738.58 and 428.59 is: 642.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.17 : 1,738.58 = 428.59 : x
  2. Step 2: Convert to fraction form
    1,159.17/1,738.58 = 428.59/x
  3. Step 3: Cross multiply
    1,159.17x = 1,738.58 × 428.59
  4. Step 4: Simplify right side
    1,159.17x = 745,138.00
  5. Step 5: Solve for x
    x = 745,138.00/1,159.17
  6. Step 6: Final answer
    x = 642.82

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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.