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Finding the Fourth Proportional to 1,953.69, 2,696.12 and 1,207.49

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Solution

The fourth proportional to 1,953.69, 2,696.12 and 1,207.49 is: 1,666.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,953.69 : 2,696.12 = 1,207.49 : x
  2. Step 2: Convert to fraction form
    1,953.69/2,696.12 = 1,207.49/x
  3. Step 3: Cross multiply
    1,953.69x = 2,696.12 × 1,207.49
  4. Step 4: Simplify right side
    1,953.69x = 3,255,518.42
  5. Step 5: Solve for x
    x = 3,255,518.42/1,953.69
  6. Step 6: Final answer
    x = 1,666.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.