Home / 640,519,444.60-958,865,979.30-381,601,389.40

Finding the Fourth Proportional to 640,519,444.60, 958,865,979.30 and 381,601,389.40

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Solution

The fourth proportional to 640,519,444.60, 958,865,979.30 and 381,601,389.40 is: 571,262,266.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,519,444.60 : 958,865,979.30 = 381,601,389.40 : x
  2. Step 2: Convert to fraction form
    640,519,444.60/958,865,979.30 = 381,601,389.40/x
  3. Step 3: Cross multiply
    640,519,444.60x = 958,865,979.30 × 381,601,389.40
  4. Step 4: Simplify right side
    640,519,444.60x = 365,904,589,949,271,616
  5. Step 5: Solve for x
    x = 365,904,589,949,271,616/640,519,444.60
  6. Step 6: Final answer
    x = 571,262,266.95

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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.