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Finding the Fourth Proportional to 520,903,163.94, 718,819,967.64 and 309,219,042.93

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Solution

The fourth proportional to 520,903,163.94, 718,819,967.64 and 309,219,042.93 is: 426,706,608.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,903,163.94 : 718,819,967.64 = 309,219,042.93 : x
  2. Step 2: Convert to fraction form
    520,903,163.94/718,819,967.64 = 309,219,042.93/x
  3. Step 3: Cross multiply
    520,903,163.94x = 718,819,967.64 × 309,219,042.93
  4. Step 4: Simplify right side
    520,903,163.94x = 222,272,822,432,614,368
  5. Step 5: Solve for x
    x = 222,272,822,432,614,368/520,903,163.94
  6. Step 6: Final answer
    x = 426,706,608.48

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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.