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Finding the Fourth Proportional to 4,858,747.79, 7,287,374.41 and 1,620,342.05

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Solution

The fourth proportional to 4,858,747.79, 7,287,374.41 and 1,620,342.05 is: 2,430,263.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,858,747.79 : 7,287,374.41 = 1,620,342.05 : x
  2. Step 2: Convert to fraction form
    4,858,747.79/7,287,374.41 = 1,620,342.05/x
  3. Step 3: Cross multiply
    4,858,747.79x = 7,287,374.41 × 1,620,342.05
  4. Step 4: Simplify right side
    4,858,747.79x = 11,808,039,150,129.21
  5. Step 5: Solve for x
    x = 11,808,039,150,129.21/4,858,747.79
  6. Step 6: Final answer
    x = 2,430,263.86

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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.