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Finding the Fourth Proportional to 660,749.90, 911,757.48 and 388,757.96

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Solution

The fourth proportional to 660,749.90, 911,757.48 and 388,757.96 is: 536,440.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,749.90 : 911,757.48 = 388,757.96 : x
  2. Step 2: Convert to fraction form
    660,749.90/911,757.48 = 388,757.96/x
  3. Step 3: Cross multiply
    660,749.90x = 911,757.48 × 388,757.96
  4. Step 4: Simplify right side
    660,749.90x = 354,452,977,939.54
  5. Step 5: Solve for x
    x = 354,452,977,939.54/660,749.90
  6. Step 6: Final answer
    x = 536,440.46

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1.5x scale

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.