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Finding the Fourth Proportional to 1,376.82, 2,065.53 and 555.12

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Solution

The fourth proportional to 1,376.82, 2,065.53 and 555.12 is: 832.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.82 : 2,065.53 = 555.12 : x
  2. Step 2: Convert to fraction form
    1,376.82/2,065.53 = 555.12/x
  3. Step 3: Cross multiply
    1,376.82x = 2,065.53 × 555.12
  4. Step 4: Simplify right side
    1,376.82x = 1,146,617.01
  5. Step 5: Solve for x
    x = 1,146,617.01/1,376.82
  6. Step 6: Final answer
    x = 832.80

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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.