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Finding the Fourth Proportional to 678,740.79, 936,636.62 and 376,954.23

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Solution

The fourth proportional to 678,740.79, 936,636.62 and 376,954.23 is: 520,182.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,740.79 : 936,636.62 = 376,954.23 : x
  2. Step 2: Convert to fraction form
    678,740.79/936,636.62 = 376,954.23/x
  3. Step 3: Cross multiply
    678,740.79x = 936,636.62 × 376,954.23
  4. Step 4: Simplify right side
    678,740.79x = 353,069,135,881.90
  5. Step 5: Solve for x
    x = 353,069,135,881.90/678,740.79
  6. Step 6: Final answer
    x = 520,182.58

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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.