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Finding the Fourth Proportional to 5,318,908.50, 7,978,362.93 and 1,329,820.50

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Solution

The fourth proportional to 5,318,908.50, 7,978,362.93 and 1,329,820.50 is: 1,994,730.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318,908.50 : 7,978,362.93 = 1,329,820.50 : x
  2. Step 2: Convert to fraction form
    5,318,908.50/7,978,362.93 = 1,329,820.50/x
  3. Step 3: Cross multiply
    5,318,908.50x = 7,978,362.93 × 1,329,820.50
  4. Step 4: Simplify right side
    5,318,908.50x = 10,609,790,580,754.06
  5. Step 5: Solve for x
    x = 10,609,790,580,754.06/5,318,908.50
  6. Step 6: Final answer
    x = 1,994,730.80

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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.