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Finding the Fourth Proportional to 485,618.40, 728,427.60 and 456,069.60

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Solution

The fourth proportional to 485,618.40, 728,427.60 and 456,069.60 is: 684,104.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,618.40 : 728,427.60 = 456,069.60 : x
  2. Step 2: Convert to fraction form
    485,618.40/728,427.60 = 456,069.60/x
  3. Step 3: Cross multiply
    485,618.40x = 728,427.60 × 456,069.60
  4. Step 4: Simplify right side
    485,618.40x = 332,213,684,160.96
  5. Step 5: Solve for x
    x = 332,213,684,160.96/485,618.40
  6. Step 6: Final answer
    x = 684,104.40

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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.