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Finding the Fourth Proportional to 2,455.79, 3,685.10 and 1,068.80

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Solution

The fourth proportional to 2,455.79, 3,685.10 and 1,068.80 is: 1,603.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,455.79 : 3,685.10 = 1,068.80 : x
  2. Step 2: Convert to fraction form
    2,455.79/3,685.10 = 1,068.80/x
  3. Step 3: Cross multiply
    2,455.79x = 3,685.10 × 1,068.80
  4. Step 4: Simplify right side
    2,455.79x = 3,938,611.11
  5. Step 5: Solve for x
    x = 3,938,611.11/2,455.79
  6. Step 6: Final answer
    x = 1,603.81

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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.