Home / 518,791,359.52-715,861,370.82-309,903,160.24

Finding the Fourth Proportional to 518,791,359.52, 715,861,370.82 and 309,903,160.24

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Solution

The fourth proportional to 518,791,359.52, 715,861,370.82 and 309,903,160.24 is: 427,624,124.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,791,359.52 : 715,861,370.82 = 309,903,160.24 : x
  2. Step 2: Convert to fraction form
    518,791,359.52/715,861,370.82 = 309,903,160.24/x
  3. Step 3: Cross multiply
    518,791,359.52x = 715,861,370.82 × 309,903,160.24
  4. Step 4: Simplify right side
    518,791,359.52x = 221,847,701,110,856,544
  5. Step 5: Solve for x
    x = 221,847,701,110,856,544/518,791,359.52
  6. Step 6: Final answer
    x = 427,624,124.88

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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.