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Finding the Fourth Proportional to 2,928.81, 4,390.11 and 1,053.45

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Solution

The fourth proportional to 2,928.81, 4,390.11 and 1,053.45 is: 1,579.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,928.81 : 4,390.11 = 1,053.45 : x
  2. Step 2: Convert to fraction form
    2,928.81/4,390.11 = 1,053.45/x
  3. Step 3: Cross multiply
    2,928.81x = 4,390.11 × 1,053.45
  4. Step 4: Simplify right side
    2,928.81x = 4,624,761.38
  5. Step 5: Solve for x
    x = 4,624,761.38/2,928.81
  6. Step 6: Final answer
    x = 1,579.06

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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.