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Finding the Fourth Proportional to 958,809.60, 1,438,732.80 and 426,412.80

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Solution

The fourth proportional to 958,809.60, 1,438,732.80 and 426,412.80 is: 639,849.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    958,809.60 : 1,438,732.80 = 426,412.80 : x
  2. Step 2: Convert to fraction form
    958,809.60/1,438,732.80 = 426,412.80/x
  3. Step 3: Cross multiply
    958,809.60x = 1,438,732.80 × 426,412.80
  4. Step 4: Simplify right side
    958,809.60x = 613,494,081,699.84
  5. Step 5: Solve for x
    x = 613,494,081,699.84/958,809.60
  6. Step 6: Final answer
    x = 639,849.75

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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.