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Finding the Fourth Proportional to 660,800.92, 911,887.55 and 388,884.83

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Solution

The fourth proportional to 660,800.92, 911,887.55 and 388,884.83 is: 536,650.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,800.92 : 911,887.55 = 388,884.83 : x
  2. Step 2: Convert to fraction form
    660,800.92/911,887.55 = 388,884.83/x
  3. Step 3: Cross multiply
    660,800.92x = 911,887.55 × 388,884.83
  4. Step 4: Simplify right side
    660,800.92x = 354,619,233,234.90
  5. Step 5: Solve for x
    x = 354,619,233,234.90/660,800.92
  6. Step 6: Final answer
    x = 536,650.64

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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.