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Finding the Fourth Proportional to 1,953.09, 2,928.03 and 912.58

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Solution

The fourth proportional to 1,953.09, 2,928.03 and 912.58 is: 1,368.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,953.09 : 2,928.03 = 912.58 : x
  2. Step 2: Convert to fraction form
    1,953.09/2,928.03 = 912.58/x
  3. Step 3: Cross multiply
    1,953.09x = 2,928.03 × 912.58
  4. Step 4: Simplify right side
    1,953.09x = 2,672,042.41
  5. Step 5: Solve for x
    x = 2,672,042.41/1,953.09
  6. Step 6: Final answer
    x = 1,368.11

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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.