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Finding the Fourth Proportional to 1,349.86, 1,862.94 and 908.68

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Solution

The fourth proportional to 1,349.86, 1,862.94 and 908.68 is: 1,254.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,349.86 : 1,862.94 = 908.68 : x
  2. Step 2: Convert to fraction form
    1,349.86/1,862.94 = 908.68/x
  3. Step 3: Cross multiply
    1,349.86x = 1,862.94 × 908.68
  4. Step 4: Simplify right side
    1,349.86x = 1,692,816.32
  5. Step 5: Solve for x
    x = 1,692,816.32/1,349.86
  6. Step 6: Final answer
    x = 1,254.07

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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.