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Finding the Fourth Proportional to 551,409.40, 826,020.60 and 485,653.60

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Solution

The fourth proportional to 551,409.40, 826,020.60 and 485,653.60 is: 727,517.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,409.40 : 826,020.60 = 485,653.60 : x
  2. Step 2: Convert to fraction form
    551,409.40/826,020.60 = 485,653.60/x
  3. Step 3: Cross multiply
    551,409.40x = 826,020.60 × 485,653.60
  4. Step 4: Simplify right side
    551,409.40x = 401,159,878,064.16
  5. Step 5: Solve for x
    x = 401,159,878,064.16/551,409.40
  6. Step 6: Final answer
    x = 727,517.30

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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.