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Finding the Fourth Proportional to 768,009.80, 1,150,545.90 and 412,905.80

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Solution

The fourth proportional to 768,009.80, 1,150,545.90 and 412,905.80 is: 618,569.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,009.80 : 1,150,545.90 = 412,905.80 : x
  2. Step 2: Convert to fraction form
    768,009.80/1,150,545.90 = 412,905.80/x
  3. Step 3: Cross multiply
    768,009.80x = 1,150,545.90 × 412,905.80
  4. Step 4: Simplify right side
    768,009.80x = 475,067,075,276.22
  5. Step 5: Solve for x
    x = 475,067,075,276.22/768,009.80
  6. Step 6: Final answer
    x = 618,569.03

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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.