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Finding the Fourth Proportional to 680,940.20, 1,021,410.30 and 539,935.40

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Solution

The fourth proportional to 680,940.20, 1,021,410.30 and 539,935.40 is: 809,903.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,940.20 : 1,021,410.30 = 539,935.40 : x
  2. Step 2: Convert to fraction form
    680,940.20/1,021,410.30 = 539,935.40/x
  3. Step 3: Cross multiply
    680,940.20x = 1,021,410.30 × 539,935.40
  4. Step 4: Simplify right side
    680,940.20x = 551,495,578,894.62
  5. Step 5: Solve for x
    x = 551,495,578,894.62/680,940.20
  6. Step 6: Final answer
    x = 809,903.10

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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.