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Finding the Fourth Proportional to 611,633.60, 917,450.40 and 485,662.40

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Solution

The fourth proportional to 611,633.60, 917,450.40 and 485,662.40 is: 728,493.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,633.60 : 917,450.40 = 485,662.40 : x
  2. Step 2: Convert to fraction form
    611,633.60/917,450.40 = 485,662.40/x
  3. Step 3: Cross multiply
    611,633.60x = 917,450.40 × 485,662.40
  4. Step 4: Simplify right side
    611,633.60x = 445,571,163,144.96
  5. Step 5: Solve for x
    x = 445,571,163,144.96/611,633.60
  6. Step 6: Final answer
    x = 728,493.60

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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.