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Finding the Fourth Proportional to 673,978.68, 930,072.78 and 372,166.20

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Solution

The fourth proportional to 673,978.68, 930,072.78 and 372,166.20 is: 513,579.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,978.68 : 930,072.78 = 372,166.20 : x
  2. Step 2: Convert to fraction form
    673,978.68/930,072.78 = 372,166.20/x
  3. Step 3: Cross multiply
    673,978.68x = 930,072.78 × 372,166.20
  4. Step 4: Simplify right side
    673,978.68x = 346,141,652,256.04
  5. Step 5: Solve for x
    x = 346,141,652,256.04/673,978.68
  6. Step 6: Final answer
    x = 513,579.53

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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.