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Finding the Fourth Proportional to 908,604.80, 1,362,907.20 and 820,131.20

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Solution

The fourth proportional to 908,604.80, 1,362,907.20 and 820,131.20 is: 1,230,196.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,604.80 : 1,362,907.20 = 820,131.20 : x
  2. Step 2: Convert to fraction form
    908,604.80/1,362,907.20 = 820,131.20/x
  3. Step 3: Cross multiply
    908,604.80x = 1,362,907.20 × 820,131.20
  4. Step 4: Simplify right side
    908,604.80x = 1,117,762,717,424.64
  5. Step 5: Solve for x
    x = 1,117,762,717,424.64/908,604.80
  6. Step 6: Final answer
    x = 1,230,196.80

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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.