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Finding the Fourth Proportional to 660,415.44, 911,376.87 and 373,991.34

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Solution

The fourth proportional to 660,415.44, 911,376.87 and 373,991.34 is: 516,110.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,415.44 : 911,376.87 = 373,991.34 : x
  2. Step 2: Convert to fraction form
    660,415.44/911,376.87 = 373,991.34/x
  3. Step 3: Cross multiply
    660,415.44x = 911,376.87 × 373,991.34
  4. Step 4: Simplify right side
    660,415.44x = 340,847,056,856.31
  5. Step 5: Solve for x
    x = 340,847,056,856.31/660,415.44
  6. Step 6: Final answer
    x = 516,110.07

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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.