Home / 1,285.91-1,929.08-555.51

Finding the Fourth Proportional to 1,285.91, 1,929.08 and 555.51

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Solution

The fourth proportional to 1,285.91, 1,929.08 and 555.51 is: 833.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.91 : 1,929.08 = 555.51 : x
  2. Step 2: Convert to fraction form
    1,285.91/1,929.08 = 555.51/x
  3. Step 3: Cross multiply
    1,285.91x = 1,929.08 × 555.51
  4. Step 4: Simplify right side
    1,285.91x = 1,071,624.62
  5. Step 5: Solve for x
    x = 1,071,624.62/1,285.91
  6. Step 6: Final answer
    x = 833.36

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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.