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Finding the Fourth Proportional to 611,956,493.82, 918,205,812.11 and 320,754,411.18

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Solution

The fourth proportional to 611,956,493.82, 918,205,812.11 and 320,754,411.18 is: 481,273,697.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,956,493.82 : 918,205,812.11 = 320,754,411.18 : x
  2. Step 2: Convert to fraction form
    611,956,493.82/918,205,812.11 = 320,754,411.18/x
  3. Step 3: Cross multiply
    611,956,493.82x = 918,205,812.11 × 320,754,411.18
  4. Step 4: Simplify right side
    611,956,493.82x = 294,518,564,605,396,800
  5. Step 5: Solve for x
    x = 294,518,564,605,396,800/611,956,493.82
  6. Step 6: Final answer
    x = 481,273,697.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.