Home / 398,411,999.80-597,617,999.70-125,747,337.40

Finding the Fourth Proportional to 398,411,999.80, 597,617,999.70 and 125,747,337.40

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Solution

The fourth proportional to 398,411,999.80, 597,617,999.70 and 125,747,337.40 is: 188,621,006.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,411,999.80 : 597,617,999.70 = 125,747,337.40 : x
  2. Step 2: Convert to fraction form
    398,411,999.80/597,617,999.70 = 125,747,337.40/x
  3. Step 3: Cross multiply
    398,411,999.80x = 597,617,999.70 × 125,747,337.40
  4. Step 4: Simplify right side
    398,411,999.80x = 75,148,872,244,589,008
  5. Step 5: Solve for x
    x = 75,148,872,244,589,008/398,411,999.80
  6. Step 6: Final answer
    x = 188,621,006.10

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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.