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Finding the Fourth Proportional to 426,268.56, 638,582.16 and 266,406.96

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Solution

The fourth proportional to 426,268.56, 638,582.16 and 266,406.96 is: 399,097.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,268.56 : 638,582.16 = 266,406.96 : x
  2. Step 2: Convert to fraction form
    426,268.56/638,582.16 = 266,406.96/x
  3. Step 3: Cross multiply
    426,268.56x = 638,582.16 × 266,406.96
  4. Step 4: Simplify right side
    426,268.56x = 170,122,731,955.83
  5. Step 5: Solve for x
    x = 170,122,731,955.83/426,268.56
  6. Step 6: Final answer
    x = 399,097.54

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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.