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Finding the Fourth Proportional to 1,602.88, 2,405.25 and 678.38

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Solution

The fourth proportional to 1,602.88, 2,405.25 and 678.38 is: 1,017.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,602.88 : 2,405.25 = 678.38 : x
  2. Step 2: Convert to fraction form
    1,602.88/2,405.25 = 678.38/x
  3. Step 3: Cross multiply
    1,602.88x = 2,405.25 × 678.38
  4. Step 4: Simplify right side
    1,602.88x = 1,631,673.50
  5. Step 5: Solve for x
    x = 1,631,673.50/1,602.88
  6. Step 6: Final answer
    x = 1,017.96

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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.