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Finding the Fourth Proportional to 1,318,405.62, 1,819,435.59 and 745,531.50

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Solution

The fourth proportional to 1,318,405.62, 1,819,435.59 and 745,531.50 is: 1,028,853.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,405.62 : 1,819,435.59 = 745,531.50 : x
  2. Step 2: Convert to fraction form
    1,318,405.62/1,819,435.59 = 745,531.50/x
  3. Step 3: Cross multiply
    1,318,405.62x = 1,819,435.59 × 745,531.50
  4. Step 4: Simplify right side
    1,318,405.62x = 1,356,446,544,566.09
  5. Step 5: Solve for x
    x = 1,356,446,544,566.09/1,318,405.62
  6. Step 6: Final answer
    x = 1,028,853.73

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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.