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Finding the Fourth Proportional to 618,903.20, 926,779.20 and 407,901.44

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Solution

The fourth proportional to 618,903.20, 926,779.20 and 407,901.44 is: 610,813.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,903.20 : 926,779.20 = 407,901.44 : x
  2. Step 2: Convert to fraction form
    618,903.20/926,779.20 = 407,901.44/x
  3. Step 3: Cross multiply
    618,903.20x = 926,779.20 × 407,901.44
  4. Step 4: Simplify right side
    618,903.20x = 378,034,570,242.05
  5. Step 5: Solve for x
    x = 378,034,570,242.05/618,903.20
  6. Step 6: Final answer
    x = 610,813.73

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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.