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Finding the Fourth Proportional to 3,072.51, 4,608.66 and 992.50

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Solution

The fourth proportional to 3,072.51, 4,608.66 and 992.50 is: 1,488.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,072.51 : 4,608.66 = 992.50 : x
  2. Step 2: Convert to fraction form
    3,072.51/4,608.66 = 992.50/x
  3. Step 3: Cross multiply
    3,072.51x = 4,608.66 × 992.50
  4. Step 4: Simplify right side
    3,072.51x = 4,574,095.05
  5. Step 5: Solve for x
    x = 4,574,095.05/3,072.51
  6. Step 6: Final answer
    x = 1,488.72

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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.