Home / 640,519,443.60-958,865,977.80-381,601,388.40

Finding the Fourth Proportional to 640,519,443.60, 958,865,977.80 and 381,601,388.40

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Solution

The fourth proportional to 640,519,443.60, 958,865,977.80 and 381,601,388.40 is: 571,262,265.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,519,443.60 : 958,865,977.80 = 381,601,388.40 : x
  2. Step 2: Convert to fraction form
    640,519,443.60/958,865,977.80 = 381,601,388.40/x
  3. Step 3: Cross multiply
    640,519,443.60x = 958,865,977.80 × 381,601,388.40
  4. Step 4: Simplify right side
    640,519,443.60x = 365,904,588,418,003,520
  5. Step 5: Solve for x
    x = 365,904,588,418,003,520/640,519,443.60
  6. Step 6: Final answer
    x = 571,262,265.45

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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.