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Finding the Fourth Proportional to 1,377.62, 2,066.49 and 555.78

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Solution

The fourth proportional to 1,377.62, 2,066.49 and 555.78 is: 833.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.62 : 2,066.49 = 555.78 : x
  2. Step 2: Convert to fraction form
    1,377.62/2,066.49 = 555.78/x
  3. Step 3: Cross multiply
    1,377.62x = 2,066.49 × 555.78
  4. Step 4: Simplify right side
    1,377.62x = 1,148,513.81
  5. Step 5: Solve for x
    x = 1,148,513.81/1,377.62
  6. Step 6: Final answer
    x = 833.69

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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.