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Finding the Fourth Proportional to 555.90, 833.90 and 519.90

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Solution

The fourth proportional to 555.90, 833.90 and 519.90 is: 779.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.90 : 833.90 = 519.90 : x
  2. Step 2: Convert to fraction form
    555.90/833.90 = 519.90/x
  3. Step 3: Cross multiply
    555.90x = 833.90 × 519.90
  4. Step 4: Simplify right side
    555.90x = 433,542.01
  5. Step 5: Solve for x
    x = 433,542.01/555.90
  6. Step 6: Final answer
    x = 779.89

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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.