Home / 1,285.94-1,929.09-555.72

Finding the Fourth Proportional to 1,285.94, 1,929.09 and 555.72

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Solution

The fourth proportional to 1,285.94, 1,929.09 and 555.72 is: 833.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.94 : 1,929.09 = 555.72 : x
  2. Step 2: Convert to fraction form
    1,285.94/1,929.09 = 555.72/x
  3. Step 3: Cross multiply
    1,285.94x = 1,929.09 × 555.72
  4. Step 4: Simplify right side
    1,285.94x = 1,072,033.89
  5. Step 5: Solve for x
    x = 1,072,033.89/1,285.94
  6. Step 6: Final answer
    x = 833.66

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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.