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Finding the Fourth Proportional to 551,405.40, 826,014.60 and 485,649.60

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Solution

The fourth proportional to 551,405.40, 826,014.60 and 485,649.60 is: 727,511.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,405.40 : 826,014.60 = 485,649.60 : x
  2. Step 2: Convert to fraction form
    551,405.40/826,014.60 = 485,649.60/x
  3. Step 3: Cross multiply
    551,405.40x = 826,014.60 × 485,649.60
  4. Step 4: Simplify right side
    551,405.40x = 401,153,660,084.16
  5. Step 5: Solve for x
    x = 401,153,660,084.16/551,405.40
  6. Step 6: Final answer
    x = 727,511.30

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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.