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Finding the Fourth Proportional to 660,528.72, 911,692.80 and 374,217.48

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Solution

The fourth proportional to 660,528.72, 911,692.80 and 374,217.48 is: 516,512.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,528.72 : 911,692.80 = 374,217.48 : x
  2. Step 2: Convert to fraction form
    660,528.72/911,692.80 = 374,217.48/x
  3. Step 3: Cross multiply
    660,528.72x = 911,692.80 × 374,217.48
  4. Step 4: Simplify right side
    660,528.72x = 341,171,382,150.14
  5. Step 5: Solve for x
    x = 341,171,382,150.14/660,528.72
  6. Step 6: Final answer
    x = 516,512.56

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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.