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Finding the Fourth Proportional to 680,744.65, 939,419.87 and 374,814.64

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Solution

The fourth proportional to 680,744.65, 939,419.87 and 374,814.64 is: 517,239.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,744.65 : 939,419.87 = 374,814.64 : x
  2. Step 2: Convert to fraction form
    680,744.65/939,419.87 = 374,814.64/x
  3. Step 3: Cross multiply
    680,744.65x = 939,419.87 × 374,814.64
  4. Step 4: Simplify right side
    680,744.65x = 352,108,320,382.90
  5. Step 5: Solve for x
    x = 352,108,320,382.90/680,744.65
  6. Step 6: Final answer
    x = 517,239.94

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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.