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Finding the Fourth Proportional to 1,905.81, 2,854.86 and 1,492.98

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Solution

The fourth proportional to 1,905.81, 2,854.86 and 1,492.98 is: 2,236.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.81 : 2,854.86 = 1,492.98 : x
  2. Step 2: Convert to fraction form
    1,905.81/2,854.86 = 1,492.98/x
  3. Step 3: Cross multiply
    1,905.81x = 2,854.86 × 1,492.98
  4. Step 4: Simplify right side
    1,905.81x = 4,262,248.88
  5. Step 5: Solve for x
    x = 4,262,248.88/1,905.81
  6. Step 6: Final answer
    x = 2,236.45

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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.