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Finding the Fourth Proportional to 611,907.20, 917,860.80 and 543,672.80

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Solution

The fourth proportional to 611,907.20, 917,860.80 and 543,672.80 is: 815,509.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,907.20 : 917,860.80 = 543,672.80 : x
  2. Step 2: Convert to fraction form
    611,907.20/917,860.80 = 543,672.80/x
  3. Step 3: Cross multiply
    611,907.20x = 917,860.80 × 543,672.80
  4. Step 4: Simplify right side
    611,907.20x = 499,015,951,146.24
  5. Step 5: Solve for x
    x = 499,015,951,146.24/611,907.20
  6. Step 6: Final answer
    x = 815,509.20

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1.5x scale

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.