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Finding the Fourth Proportional to 623,287.84, 935,761.44 and 421,561.60

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Solution

The fourth proportional to 623,287.84, 935,761.44 and 421,561.60 is: 632,903.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,287.84 : 935,761.44 = 421,561.60 : x
  2. Step 2: Convert to fraction form
    623,287.84/935,761.44 = 421,561.60/x
  3. Step 3: Cross multiply
    623,287.84x = 935,761.44 × 421,561.60
  4. Step 4: Simplify right side
    623,287.84x = 394,481,089,864.70
  5. Step 5: Solve for x
    x = 394,481,089,864.70/623,287.84
  6. Step 6: Final answer
    x = 632,903.56

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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.