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Finding the Fourth Proportional to 621,721.60, 933,964.80 and 605,132.80

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Solution

The fourth proportional to 621,721.60, 933,964.80 and 605,132.80 is: 909,044.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,721.60 : 933,964.80 = 605,132.80 : x
  2. Step 2: Convert to fraction form
    621,721.60/933,964.80 = 605,132.80/x
  3. Step 3: Cross multiply
    621,721.60x = 933,964.80 × 605,132.80
  4. Step 4: Simplify right side
    621,721.60x = 565,172,734,525.44
  5. Step 5: Solve for x
    x = 565,172,734,525.44/621,721.60
  6. Step 6: Final answer
    x = 909,044.71

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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.