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Finding the Fourth Proportional to 1,318,694.96, 1,819,838.68 and 745,723.64

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Solution

The fourth proportional to 1,318,694.96, 1,819,838.68 and 745,723.64 is: 1,029,121.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,694.96 : 1,819,838.68 = 745,723.64 : x
  2. Step 2: Convert to fraction form
    1,318,694.96/1,819,838.68 = 745,723.64/x
  3. Step 3: Cross multiply
    1,318,694.96x = 1,819,838.68 × 745,723.64
  4. Step 4: Simplify right side
    1,318,694.96x = 1,357,096,724,662.40
  5. Step 5: Solve for x
    x = 1,357,096,724,662.40/1,318,694.96
  6. Step 6: Final answer
    x = 1,029,121.04

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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.