Home / 1,159.20-1,737.93-428.77

Finding the Fourth Proportional to 1,159.20, 1,737.93 and 428.77

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Solution

The fourth proportional to 1,159.20, 1,737.93 and 428.77 is: 642.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.20 : 1,737.93 = 428.77 : x
  2. Step 2: Convert to fraction form
    1,159.20/1,737.93 = 428.77/x
  3. Step 3: Cross multiply
    1,159.20x = 1,737.93 × 428.77
  4. Step 4: Simplify right side
    1,159.20x = 745,172.25
  5. Step 5: Solve for x
    x = 745,172.25/1,159.20
  6. Step 6: Final answer
    x = 642.83

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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.