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Finding the Fourth Proportional to 1,787.96, 2,681.68 and 555.32

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Solution

The fourth proportional to 1,787.96, 2,681.68 and 555.32 is: 832.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.96 : 2,681.68 = 555.32 : x
  2. Step 2: Convert to fraction form
    1,787.96/2,681.68 = 555.32/x
  3. Step 3: Cross multiply
    1,787.96x = 2,681.68 × 555.32
  4. Step 4: Simplify right side
    1,787.96x = 1,489,190.54
  5. Step 5: Solve for x
    x = 1,489,190.54/1,787.96
  6. Step 6: Final answer
    x = 832.90

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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.