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Finding the Fourth Proportional to 1,377.82, 2,068.21 and 556.63

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Solution

The fourth proportional to 1,377.82, 2,068.21 and 556.63 is: 835.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.82 : 2,068.21 = 556.63 : x
  2. Step 2: Convert to fraction form
    1,377.82/2,068.21 = 556.63/x
  3. Step 3: Cross multiply
    1,377.82x = 2,068.21 × 556.63
  4. Step 4: Simplify right side
    1,377.82x = 1,151,227.51
  5. Step 5: Solve for x
    x = 1,151,227.51/1,377.82
  6. Step 6: Final answer
    x = 835.54

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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.