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Finding the Fourth Proportional to 710,014,021.76, 979,800,554.70 and 396,750,809.90

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Solution

The fourth proportional to 710,014,021.76, 979,800,554.70 and 396,750,809.90 is: 547,505,614.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,014,021.76 : 979,800,554.70 = 396,750,809.90 : x
  2. Step 2: Convert to fraction form
    710,014,021.76/979,800,554.70 = 396,750,809.90/x
  3. Step 3: Cross multiply
    710,014,021.76x = 979,800,554.70 × 396,750,809.90
  4. Step 4: Simplify right side
    710,014,021.76x = 388,736,663,620,143,744
  5. Step 5: Solve for x
    x = 388,736,663,620,143,744/710,014,021.76
  6. Step 6: Final answer
    x = 547,505,614.97

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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.