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Finding the Fourth Proportional to 678,348.76, 936,074.46 and 376,519

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Solution

The fourth proportional to 678,348.76, 936,074.46 and 376,519 is: 519,570.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,348.76 : 936,074.46 = 376,519 : x
  2. Step 2: Convert to fraction form
    678,348.76/936,074.46 = 376,519/x
  3. Step 3: Cross multiply
    678,348.76x = 936,074.46 × 376,519
  4. Step 4: Simplify right side
    678,348.76x = 352,449,819,604.74
  5. Step 5: Solve for x
    x = 352,449,819,604.74/678,348.76
  6. Step 6: Final answer
    x = 519,570.23

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1.5x scale

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.