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Finding the Fourth Proportional to 636,268.50, 877,399.56 and 421,330.14

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Solution

The fourth proportional to 636,268.50, 877,399.56 and 421,330.14 is: 581,004.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,268.50 : 877,399.56 = 421,330.14 : x
  2. Step 2: Convert to fraction form
    636,268.50/877,399.56 = 421,330.14/x
  3. Step 3: Cross multiply
    636,268.50x = 877,399.56 × 421,330.14
  4. Step 4: Simplify right side
    636,268.50x = 369,674,879,450.74
  5. Step 5: Solve for x
    x = 369,674,879,450.74/636,268.50
  6. Step 6: Final answer
    x = 581,004.53

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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.