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Finding the Fourth Proportional to 289,379.13, 399,274.56 and 168,447.75

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Solution

The fourth proportional to 289,379.13, 399,274.56 and 168,447.75 is: 232,417.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,379.13 : 399,274.56 = 168,447.75 : x
  2. Step 2: Convert to fraction form
    289,379.13/399,274.56 = 168,447.75/x
  3. Step 3: Cross multiply
    289,379.13x = 399,274.56 × 168,447.75
  4. Step 4: Simplify right side
    289,379.13x = 67,256,901,264.24
  5. Step 5: Solve for x
    x = 67,256,901,264.24/289,379.13
  6. Step 6: Final answer
    x = 232,417.94

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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.