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Finding the Fourth Proportional to 289,612.58, 399,665.48 and 176,435.33

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Solution

The fourth proportional to 289,612.58, 399,665.48 and 176,435.33 is: 243,480.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,612.58 : 399,665.48 = 176,435.33 : x
  2. Step 2: Convert to fraction form
    289,612.58/399,665.48 = 176,435.33/x
  3. Step 3: Cross multiply
    289,612.58x = 399,665.48 × 176,435.33
  4. Step 4: Simplify right side
    289,612.58x = 70,515,107,972.90
  5. Step 5: Solve for x
    x = 70,515,107,972.90/289,612.58
  6. Step 6: Final answer
    x = 243,480.82

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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.