Home / 820,800.40-1,231,200.60-288,403.60

Finding the Fourth Proportional to 820,800.40, 1,231,200.60 and 288,403.60

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Solution

The fourth proportional to 820,800.40, 1,231,200.60 and 288,403.60 is: 432,605.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,800.40 : 1,231,200.60 = 288,403.60 : x
  2. Step 2: Convert to fraction form
    820,800.40/1,231,200.60 = 288,403.60/x
  3. Step 3: Cross multiply
    820,800.40x = 1,231,200.60 × 288,403.60
  4. Step 4: Simplify right side
    820,800.40x = 355,082,685,362.16
  5. Step 5: Solve for x
    x = 355,082,685,362.16/820,800.40
  6. Step 6: Final answer
    x = 432,605.40

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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.