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Finding the Fourth Proportional to 519,485.40, 778,577.62 and 279,008.35

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Solution

The fourth proportional to 519,485.40, 778,577.62 and 279,008.35 is: 418,163.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,485.40 : 778,577.62 = 279,008.35 : x
  2. Step 2: Convert to fraction form
    519,485.40/778,577.62 = 279,008.35/x
  3. Step 3: Cross multiply
    519,485.40x = 778,577.62 × 279,008.35
  4. Step 4: Simplify right side
    519,485.40x = 217,229,654,982.30
  5. Step 5: Solve for x
    x = 217,229,654,982.30/519,485.40
  6. Step 6: Final answer
    x = 418,163.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.