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Finding the Fourth Proportional to 499,616.40, 749,424.60 and 447,128.40

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Solution

The fourth proportional to 499,616.40, 749,424.60 and 447,128.40 is: 670,692.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,616.40 : 749,424.60 = 447,128.40 : x
  2. Step 2: Convert to fraction form
    499,616.40/749,424.60 = 447,128.40/x
  3. Step 3: Cross multiply
    499,616.40x = 749,424.60 × 447,128.40
  4. Step 4: Simplify right side
    499,616.40x = 335,089,022,318.64
  5. Step 5: Solve for x
    x = 335,089,022,318.64/499,616.40
  6. Step 6: Final answer
    x = 670,692.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.