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Finding the Fourth Proportional to 2,953.06, 4,428.55 and 872.51

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Solution

The fourth proportional to 2,953.06, 4,428.55 and 872.51 is: 1,308.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,953.06 : 4,428.55 = 872.51 : x
  2. Step 2: Convert to fraction form
    2,953.06/4,428.55 = 872.51/x
  3. Step 3: Cross multiply
    2,953.06x = 4,428.55 × 872.51
  4. Step 4: Simplify right side
    2,953.06x = 3,863,954.16
  5. Step 5: Solve for x
    x = 3,863,954.16/2,953.06
  6. Step 6: Final answer
    x = 1,308.46

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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.