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Finding the Fourth Proportional to 678,740.66, 936,636.45 and 376,954.10

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Solution

The fourth proportional to 678,740.66, 936,636.45 and 376,954.10 is: 520,182.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,740.66 : 936,636.45 = 376,954.10 : x
  2. Step 2: Convert to fraction form
    678,740.66/936,636.45 = 376,954.10/x
  3. Step 3: Cross multiply
    678,740.66x = 936,636.45 × 376,954.10
  4. Step 4: Simplify right side
    678,740.66x = 353,068,950,036.95
  5. Step 5: Solve for x
    x = 353,068,950,036.95/678,740.66
  6. Step 6: Final answer
    x = 520,182.41

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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.