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Finding the Fourth Proportional to 451,640.40, 677,460.60 and 345,352.20

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Solution

The fourth proportional to 451,640.40, 677,460.60 and 345,352.20 is: 518,028.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,640.40 : 677,460.60 = 345,352.20 : x
  2. Step 2: Convert to fraction form
    451,640.40/677,460.60 = 345,352.20/x
  3. Step 3: Cross multiply
    451,640.40x = 677,460.60 × 345,352.20
  4. Step 4: Simplify right side
    451,640.40x = 233,962,508,623.32
  5. Step 5: Solve for x
    x = 233,962,508,623.32/451,640.40
  6. Step 6: Final answer
    x = 518,028.30

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Double scale
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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.