Home / 1,285.92-1,929.42-555.66

Finding the Fourth Proportional to 1,285.92, 1,929.42 and 555.66

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Solution

The fourth proportional to 1,285.92, 1,929.42 and 555.66 is: 833.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.92 : 1,929.42 = 555.66 : x
  2. Step 2: Convert to fraction form
    1,285.92/1,929.42 = 555.66/x
  3. Step 3: Cross multiply
    1,285.92x = 1,929.42 × 555.66
  4. Step 4: Simplify right side
    1,285.92x = 1,072,101.52
  5. Step 5: Solve for x
    x = 1,072,101.52/1,285.92
  6. Step 6: Final answer
    x = 833.72

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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.