Home / 419,904,921.40-629,857,382.10-288,390,988.60

Finding the Fourth Proportional to 419,904,921.40, 629,857,382.10 and 288,390,988.60

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Solution

The fourth proportional to 419,904,921.40, 629,857,382.10 and 288,390,988.60 is: 432,586,482.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,921.40 : 629,857,382.10 = 288,390,988.60 : x
  2. Step 2: Convert to fraction form
    419,904,921.40/629,857,382.10 = 288,390,988.60/x
  3. Step 3: Cross multiply
    419,904,921.40x = 629,857,382.10 × 288,390,988.60
  4. Step 4: Simplify right side
    419,904,921.40x = 181,645,193,100,826,976
  5. Step 5: Solve for x
    x = 181,645,193,100,826,976/419,904,921.40
  6. Step 6: Final answer
    x = 432,586,482.90

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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.