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Finding the Fourth Proportional to 520,711,978.46, 718,535,035.03 and 308,982,323.30

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Solution

The fourth proportional to 520,711,978.46, 718,535,035.03 and 308,982,323.30 is: 426,367,423.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,711,978.46 : 718,535,035.03 = 308,982,323.30 : x
  2. Step 2: Convert to fraction form
    520,711,978.46/718,535,035.03 = 308,982,323.30/x
  3. Step 3: Cross multiply
    520,711,978.46x = 718,535,035.03 × 308,982,323.30
  4. Step 4: Simplify right side
    520,711,978.46x = 222,014,624,496,016,288
  5. Step 5: Solve for x
    x = 222,014,624,496,016,288/520,711,978.46
  6. Step 6: Final answer
    x = 426,367,423.22

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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.