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Finding the Fourth Proportional to 660,494.12, 911,485.53 and 388,572.26

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Solution

The fourth proportional to 660,494.12, 911,485.53 and 388,572.26 is: 536,231.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,494.12 : 911,485.53 = 388,572.26 : x
  2. Step 2: Convert to fraction form
    660,494.12/911,485.53 = 388,572.26/x
  3. Step 3: Cross multiply
    660,494.12x = 911,485.53 × 388,572.26
  4. Step 4: Simplify right side
    660,494.12x = 354,177,987,791.97
  5. Step 5: Solve for x
    x = 354,177,987,791.97/660,494.12
  6. Step 6: Final answer
    x = 536,231.86

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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.