Home / 640,263,940.80-883,223,408.40-389,445,046.40

Finding the Fourth Proportional to 640,263,940.80, 883,223,408.40 and 389,445,046.40

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Solution

The fourth proportional to 640,263,940.80, 883,223,408.40 and 389,445,046.40 is: 537,226,851.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,263,940.80 : 883,223,408.40 = 389,445,046.40 : x
  2. Step 2: Convert to fraction form
    640,263,940.80/883,223,408.40 = 389,445,046.40/x
  3. Step 3: Cross multiply
    640,263,940.80x = 883,223,408.40 × 389,445,046.40
  4. Step 4: Simplify right side
    640,263,940.80x = 343,966,981,265,904,128
  5. Step 5: Solve for x
    x = 343,966,981,265,904,128/640,263,940.80
  6. Step 6: Final answer
    x = 537,226,851.85

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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.