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Finding the Fourth Proportional to 679,902.46, 938,245.80 and 373,978.82

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Solution

The fourth proportional to 679,902.46, 938,245.80 and 373,978.82 is: 516,079.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,902.46 : 938,245.80 = 373,978.82 : x
  2. Step 2: Convert to fraction form
    679,902.46/938,245.80 = 373,978.82/x
  3. Step 3: Cross multiply
    679,902.46x = 938,245.80 × 373,978.82
  4. Step 4: Simplify right side
    679,902.46x = 350,884,057,153.96
  5. Step 5: Solve for x
    x = 350,884,057,153.96/679,902.46
  6. Step 6: Final answer
    x = 516,079.99

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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.