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Finding the Fourth Proportional to 660,460.85, 911,420.56 and 388,546.26

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Solution

The fourth proportional to 660,460.85, 911,420.56 and 388,546.26 is: 536,184.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,460.85 : 911,420.56 = 388,546.26 : x
  2. Step 2: Convert to fraction form
    660,460.85/911,420.56 = 388,546.26/x
  3. Step 3: Cross multiply
    660,460.85x = 911,420.56 × 388,546.26
  4. Step 4: Simplify right side
    660,460.85x = 354,129,043,375.27
  5. Step 5: Solve for x
    x = 354,129,043,375.27/660,460.85
  6. Step 6: Final answer
    x = 536,184.76

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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.