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Finding the Fourth Proportional to 1,102.86, 1,518.14 and 953.42

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Solution

The fourth proportional to 1,102.86, 1,518.14 and 953.42 is: 1,312.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.86 : 1,518.14 = 953.42 : x
  2. Step 2: Convert to fraction form
    1,102.86/1,518.14 = 953.42/x
  3. Step 3: Cross multiply
    1,102.86x = 1,518.14 × 953.42
  4. Step 4: Simplify right side
    1,102.86x = 1,447,412.68
  5. Step 5: Solve for x
    x = 1,447,412.68/1,102.86
  6. Step 6: Final answer
    x = 1,312.42

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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.