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Finding the Fourth Proportional to 659,460.40, 989,190.60 and 431,137.60

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Solution

The fourth proportional to 659,460.40, 989,190.60 and 431,137.60 is: 646,706.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,460.40 : 989,190.60 = 431,137.60 : x
  2. Step 2: Convert to fraction form
    659,460.40/989,190.60 = 431,137.60/x
  3. Step 3: Cross multiply
    659,460.40x = 989,190.60 × 431,137.60
  4. Step 4: Simplify right side
    659,460.40x = 426,477,261,226.56
  5. Step 5: Solve for x
    x = 426,477,261,226.56/659,460.40
  6. Step 6: Final answer
    x = 646,706.40

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Double scale
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Similar ratio
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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.