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Finding the Fourth Proportional to 5,318,908.13, 7,978,362.20 and 1,329,820.13

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Solution

The fourth proportional to 5,318,908.13, 7,978,362.20 and 1,329,820.13 is: 1,994,730.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318,908.13 : 7,978,362.20 = 1,329,820.13 : x
  2. Step 2: Convert to fraction form
    5,318,908.13/7,978,362.20 = 1,329,820.13/x
  3. Step 3: Cross multiply
    5,318,908.13x = 7,978,362.20 × 1,329,820.13
  4. Step 4: Simplify right side
    5,318,908.13x = 10,609,786,611,450.17
  5. Step 5: Solve for x
    x = 10,609,786,611,450.17/5,318,908.13
  6. Step 6: Final answer
    x = 1,994,730.19

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1.5x scale

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.