Home / 309,973,920-427,678,888.32-215,782,506.24

Finding the Fourth Proportional to 309,973,920, 427,678,888.32 and 215,782,506.24

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Solution

The fourth proportional to 309,973,920, 427,678,888.32 and 215,782,506.24 is: 297,720,603.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,973,920 : 427,678,888.32 = 215,782,506.24 : x
  2. Step 2: Convert to fraction form
    309,973,920/427,678,888.32 = 215,782,506.24/x
  3. Step 3: Cross multiply
    309,973,920x = 427,678,888.32 × 215,782,506.24
  4. Step 4: Simplify right side
    309,973,920x = 92,285,622,387,626,672
  5. Step 5: Solve for x
    x = 92,285,622,387,626,672/309,973,920
  6. Step 6: Final answer
    x = 297,720,603.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.