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Finding the Fourth Proportional to 218,482,707.90, 327,724,061.85 and 208,405,011.90

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Solution

The fourth proportional to 218,482,707.90, 327,724,061.85 and 208,405,011.90 is: 312,607,517.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,482,707.90 : 327,724,061.85 = 208,405,011.90 : x
  2. Step 2: Convert to fraction form
    218,482,707.90/327,724,061.85 = 208,405,011.90/x
  3. Step 3: Cross multiply
    218,482,707.90x = 327,724,061.85 × 208,405,011.90
  4. Step 4: Simplify right side
    218,482,707.90x = 68,299,337,009,765,592
  5. Step 5: Solve for x
    x = 68,299,337,009,765,592/218,482,707.90
  6. Step 6: Final answer
    x = 312,607,517.85

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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.