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Finding the Fourth Proportional to 2,905.01, 4,008.79 and 1,578.68

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Solution

The fourth proportional to 2,905.01, 4,008.79 and 1,578.68 is: 2,178.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,905.01 : 4,008.79 = 1,578.68 : x
  2. Step 2: Convert to fraction form
    2,905.01/4,008.79 = 1,578.68/x
  3. Step 3: Cross multiply
    2,905.01x = 4,008.79 × 1,578.68
  4. Step 4: Simplify right side
    2,905.01x = 6,328,602.67
  5. Step 5: Solve for x
    x = 6,328,602.67/2,905.01
  6. Step 6: Final answer
    x = 2,178.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.