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Finding the Fourth Proportional to 908,577.80, 1,362,866.70 and 820,104.20

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Solution

The fourth proportional to 908,577.80, 1,362,866.70 and 820,104.20 is: 1,230,156.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,577.80 : 1,362,866.70 = 820,104.20 : x
  2. Step 2: Convert to fraction form
    908,577.80/1,362,866.70 = 820,104.20/x
  3. Step 3: Cross multiply
    908,577.80x = 1,362,866.70 × 820,104.20
  4. Step 4: Simplify right side
    908,577.80x = 1,117,692,704,710.14
  5. Step 5: Solve for x
    x = 1,117,692,704,710.14/908,577.80
  6. Step 6: Final answer
    x = 1,230,156.30

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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.