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Finding the Fourth Proportional to 683,940, 943,886.04 and 378,009.80

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Solution

The fourth proportional to 683,940, 943,886.04 and 378,009.80 is: 521,680.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    683,940 : 943,886.04 = 378,009.80 : x
  2. Step 2: Convert to fraction form
    683,940/943,886.04 = 378,009.80/x
  3. Step 3: Cross multiply
    683,940x = 943,886.04 × 378,009.80
  4. Step 4: Simplify right side
    683,940x = 356,798,173,203.19
  5. Step 5: Solve for x
    x = 356,798,173,203.19/683,940
  6. Step 6: Final answer
    x = 521,680.52

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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.