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Finding the Fourth Proportional to 519,386.45, 780,449.63 and 279,677.58

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Solution

The fourth proportional to 519,386.45, 780,449.63 and 279,677.58 is: 420,254.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,386.45 : 780,449.63 = 279,677.58 : x
  2. Step 2: Convert to fraction form
    519,386.45/780,449.63 = 279,677.58/x
  3. Step 3: Cross multiply
    519,386.45x = 780,449.63 × 279,677.58
  4. Step 4: Simplify right side
    519,386.45x = 218,274,267,663.45
  5. Step 5: Solve for x
    x = 218,274,267,663.45/519,386.45
  6. Step 6: Final answer
    x = 420,254.06

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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.