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Finding the Fourth Proportional to 339,991.76, 509,981.88 and 118,370

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Solution

The fourth proportional to 339,991.76, 509,981.88 and 118,370 is: 177,552.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,991.76 : 509,981.88 = 118,370 : x
  2. Step 2: Convert to fraction form
    339,991.76/509,981.88 = 118,370/x
  3. Step 3: Cross multiply
    339,991.76x = 509,981.88 × 118,370
  4. Step 4: Simplify right side
    339,991.76x = 60,366,555,135.60
  5. Step 5: Solve for x
    x = 60,366,555,135.60/339,991.76
  6. Step 6: Final answer
    x = 177,552.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.