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Finding the Fourth Proportional to 709,168,103.43, 978,913,139.18 and 426,923,668.23

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Solution

The fourth proportional to 709,168,103.43, 978,913,139.18 and 426,923,668.23 is: 589,311,879.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,168,103.43 : 978,913,139.18 = 426,923,668.23 : x
  2. Step 2: Convert to fraction form
    709,168,103.43/978,913,139.18 = 426,923,668.23/x
  3. Step 3: Cross multiply
    709,168,103.43x = 978,913,139.18 × 426,923,668.23
  4. Step 4: Simplify right side
    709,168,103.43x = 417,921,188,255,135,488
  5. Step 5: Solve for x
    x = 417,921,188,255,135,488/709,168,103.43
  6. Step 6: Final answer
    x = 589,311,879.98

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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.