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Finding the Fourth Proportional to 443,670.40, 665,505.60 and 406,928.80

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Solution

The fourth proportional to 443,670.40, 665,505.60 and 406,928.80 is: 610,393.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,670.40 : 665,505.60 = 406,928.80 : x
  2. Step 2: Convert to fraction form
    443,670.40/665,505.60 = 406,928.80/x
  3. Step 3: Cross multiply
    443,670.40x = 665,505.60 × 406,928.80
  4. Step 4: Simplify right side
    443,670.40x = 270,813,395,201.28
  5. Step 5: Solve for x
    x = 270,813,395,201.28/443,670.40
  6. Step 6: Final answer
    x = 610,393.20

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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.