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Finding the Fourth Proportional to 998.00, 1,377.27 and 555.93

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Solution

The fourth proportional to 998.00, 1,377.27 and 555.93 is: 767.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.00 : 1,377.27 = 555.93 : x
  2. Step 2: Convert to fraction form
    998.00/1,377.27 = 555.93/x
  3. Step 3: Cross multiply
    998.00x = 1,377.27 × 555.93
  4. Step 4: Simplify right side
    998.00x = 765,665.71
  5. Step 5: Solve for x
    x = 765,665.71/998.00
  6. Step 6: Final answer
    x = 767.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.